What a wonderful creation. Sterling work, good sir.
I just wish I had a decent printer to manifest my works in physical reality. BTW, has anyone managed to succeed in producing cards that are indistinguishable in quality from the official materials? I mean to the point that they could be mixed into a deck and genuinely get lost in the shuffle?
This is unlikely without a lot of effort and expense. In fact, I can often tell what expansion an official card is from by looking at the back of the card, because there are minor variations in colour or the card coating between printers and print runs. But don't despair. There were a few threads on mixing custom and official components on the old/old old forums. Here are the replies from one of those (one of, if not the, most recent one):
When you add new components of some kind, also add in some copies of existing items. For example, add in some extra cultists when adding new monster tokens. This separates the fact that new tokens feel or look different from the fact that they have new content, so there is less temptation to take advantage of the different look/feel.
Instead of mixing new material into the decks, only use it in conjunction with something that is not random (or that is easier to randomize). For example, an investigator who starts with a specific starting item as opposed to mixing that item into the deck.
Completely replace a particular deck with new content. The Gilman Memorial Exhibit does this for Exhibit Items.
Balance the content that you add (you should do this anyway). For example, if you add new unique items, the mean of their list prices should be approximately $5. If you know that the custom item at the top of the deck could be one of the ones that is worth $1, it reduces the temptation to make a special effort to get it. The Dunwich Horror expansion added several powerful new items, but it also added tasks and missions (worth $0 and $2-3, respectively) to balance them out.
Don't worry about it and rely on the honesty of the players.
When drawing a monster, tip the cup and gently shake until a monster falls out instead of using your hand. If more than one falls out, take the one that is closest to you. Or, use something other than your hands to draw (such as tongs). Or, wear a glove.
For some decks, you can easily keep the official and custom decks separate and then randomly (or even deterministically) determine which to draw from when a card is needed. For example, if you make a new mythos deck that is 1/2 the size of the official deck, then you can roll a die at the start of the Mythos phase. On a 5-6, draw from the custom deck. Otherwise, draw from the official deck.
(Dublin Ireland/Glasgow Scotland:)
The only way we know to add new things to the decks so their appearance is indistinguishable from the other cards --- is to take rejected cards that one has previously removed -- example, really stupid spells that don't work well -- and just print a couple of words across their text side with a felt tip pen or something. This marked card is then shuffled back into the appropriate deck. The home-made card with complete instructions is in the box for a reference, but is not actually drawn.
For example, we took a few discarded spells, wrote a couple of words across the text, and then shuffled them back into the spell deck. They link to home-made cards not actually drawn.
This system would not be good for many of you, who are very intent on not marring or blemishing any cards in your set, regardless of whether you want those cards in play or not.
The simple solution to monsters in the cup feeling different to the others in the cup is to use spawn monsters from Dunwich that are not in play as tokens that cause the custom monsters to arrive on the board.
Glaaki isn't the GOO? You've got five tokens right there that will cause you to pull a homebrew creature instead.
(Formerly known as Jake:)
GOO and Investigators is pretty easy to add. Roll of randomly at start of game to detremine them. Small cards are tricky.
Do you know what would be extraordinarily helpful? If FFG were to put out a set of cards with blank fronts and some blank monster counter sheets to which players could "sticker" their custom components.
For the full-size cards, you could use card protectors that prevent players from feeling the texture of the card. You could even get the ones which mask the back side of the cards, although that would make sorting trickier. Also, your cards wouldn't fit in the original AH box anymore.
You could look for a cheap copy of King in Yellow or Curse of the Dark Pharoah to get spare cards to customise.