Hello Chuck,
It's usually not too hard to drill HO center sills by chucking the bit at the extreme end in a pin vise and turning it by hand. Use a scriber to prick a good starting point. For drilling cross members I use an oversize bit and drill the hole at an angle. Being a little oversize, the angled hole will allow the desired size of wire to pass through at a right angle. If anyone wants to criticize my oversized holes, my answer is that I didn't give you permission to pick up my freight car!
So long,
Andy
Andy Sperandeo
Executive Editor
Model Railroader magazine
asperandeo@...
262-796-8776, ext. 461
FAX 262-796-1142