Oil tank fit, /6 conversion Options

[930cabman]

How many guys have done the /6 conversion and had the tank cut outs fit correctly with a new tank?

can we "assume" all inner fender stampings are identical, but maybe not?

I have two new welded aluminum tanks from different suppliers, neither would fit into the location as supplied. I cut 3/8" from the vent pipe to get one of these into the correct area. Then I proceeded to drill the mounting holes and followed with the hole saws.
Once again, I assumed with all of the new penetrations centered in their respective stamped recesses all would be correct.

Not, the oil filter console is off center 1/4" and the oil fill stub is offlocation by 3/16"

Is this a common issue?

One of the vendors when contacted claim "We typically cut all the holes a little large, then float the tank &filter console into place"

Sounds hokey to me.