First off.. where is the talent in RTPsi?
It's not in the list of talents..
Also if you take the conversion rules as written AND use the errata'ed version of the talent.. Does anyone else think that an average Psyker with a WP of 50 (I consider that average by the time they've gotten Corpus Coversion) being able to get +25% to their Focus Power test up to 5 times! is a bit broke?
This assumes that a +1d10 will provide an average of +5 to your power roll. I suppose you could roll your Corpus Coversion dice and then add the converted actual total to your Focus power test, but that means a +25% to 250% bonus.
Sure I realise that the errata as written means "Permanent Toughness damage" but that's still an average potential +125% to your skill roll.
I admit I may have missed something , have only had the book a few days (UK based got it on Wednesday)
ps. For any without the book to hand the conversion rules state that anything that gives you a +1 to your power roll equates to a +5% to your Focus Power Test.