I have a Tapco flat here. Just for kicks i printed out 2 paper templates from this website http://pookieweb.dyndns.org:61129/AK/docs/templates.htm
and when i hold them over the flat and line everything up, and look at a bright light to see through the flat holes i see that the selector lever holes are about .200 of an inch off. Has anyone ever noticed this? Maybe it is not critical as long as they are across from each other?
All i can say is that there is a bib variation from the Tapco flat VS what guys are using for a template on pre-bent receivers.