I can say this much if George Pils is stating it's due to dynotune then it is. Mr. Pils is well known in this area for racing and speaks the truth. Very outstanding person.
As for buying anything from Dynotune...... never. I am ready to replace my 383 with a new 434 and was looking at Dynotune and going to CA next month so I was checking on a flight over to see the shop and the motors. If I was going to chose them it was build the motor and I will fly out and ship it back myself. No money up front for a standard 434, if your shop can not have them in stock then you do not get my money. I don't play the rob peter to pay paul game.
NOW NO WAY IN HE_L WOULD I USE THEM. Your words and actions have lost you a sale with me.
And this is not any bull $hit.