Hi, I just received my kitset Workbee. The 48 wheels went together ok and now I am at the part of assembling the "Y-Plate" (page 7 of the manual). I have a problem with bolting the Acme nut blocks to the Y Plate. The holes drilling in the nut blocks are not large enough diameter for the spacer and precision shim to fit inside and therefore the blocks cannot be bolted flush onto the Y Plate. Have I misunderstood the instructions? Anyone else had this issue and can advise me what you did. I an reluctant to go drilling out the Nut blocks.