CBK07
Great job.... I to have experienced the lack of customer service from DPM... I have the ARC version like you and purchased the recommended YS140L. Put together just as recommended in the plans and fortunately I check the CG just prior to covering...you guessed it...needed 28oz in the nose to balance at recommended CG... OUCH. Even had a heavier Hyde engine mount. I had ordered the extra cowl and received it the other day and low and behold it was a painted one. Can you imagine how much work it would be to remove all the paint..Returned it and will wait probably another 2 months to get the unpainted one. For now I have shelved the plane cause I know that just moving the elevator servo forward and using a pull-pull method will not be enough to counteract the heavy tail. Am thinking about going gas like you did but am still feeling the pinch of buying a YS140 - Hyde mount and Slimline muffler = $800. Very disappointed right now. Will watch column for your first flight reports with interest.
Regards
Paul Eagon