I am trying to figure out the the difference in the Tamiya DMD units. I know my Sherman is supposed to have an 05 but what if I used 08? Is there any problems or is it per the club issue? Or motor size limit? I know some have recoil also so some info would help since all vendors seem to be out of the DMD 05 right know but two European vendors that want over $350 for one plus shipping. I assuming Tamiya must be back in production on parts because little is in stock but has a restock date and not a discontinued.