yeah,what i found is if you use the irs machined arms or machine the bottoms yourself,that takes care of the uneven mounting surfaces.then i just offset the castor shims(2 in front on right and 1 in front and one behind the castor block)to get even castor and the front end works great.i know it sounds silly to have to do all this but once i do,its extremely light,never break,and dead on the money as far as adjustments go.
