Originally Posted by dddd

I didn't know that Sugino ever made an 86bcd crankset.

I've seen only SR-Apex and stronglight cranks with the 86bcd.

Couldn't you just countersink the small ring enough to let the nut reach through?

And I believe that on occasion I've had to set up cranks with just the heads of the bolts securing the big ring counter-bored holes on location, and that it actually stayed put, presumeably since steel chainring bolts can be heavily tightened.

I've even re-located chainring bolt holes using a rat-tail file, and also trimmed the tabs to rest on the ledges of the crank spider arms using a bigger half-round file.
It didn't seem to be such a critical issue as far as everything lining up perfectly, and I did it entirely by hand and by eyeball with seemingly excellent results on a Triomphe crankset for example, so as to fit a 36t MTB chainring.