james, i went in .25" on the center brace and for the set up im running right now i have the battery all the way back so my drive cup and bearing cap mount where interfering so i just dremeled a little out of the bearing cap mount at a time and rechecked until i got it just right. the my drive cup was hitting, and i had already dremeled down the stock drive cups but i needed to go to an even smaller diameter. so you will need to dremel the drive cup down to a really small diameter if you went in as far as i did. i hope it holds.
everything is clear of binding now though.