VFF Wheel spacers?

[BGG]

In the monopisto rules it says we can run up to 1.5" wheel spacers in Vintage Formula Ford. Is this common place? It seems to me that it would mess with Scrub radius and possibly cause other alignment issues.

Are my alignment worries not a problem? Do most people run them?

[bob darcey]

This question hasn't been responded to, so I assume there's not a lot of opinion out there. I don't have any great answer, but here's a good explanation/definition of scrub radius:
https://www.carthrottle.com/post/wha...-it-important/

I put a similar question out years ago (wow, 2006) and got some response:
https://forums.autosport.com/topic/87244-scrub-radius/

The '72 SCCA GCR (RMVR's system of rules) also limits spacer width th 1.5" for FF.. I've got two VFF's--one uses spacers (Triumph uprights), the other (Lola uprights) does not. Both cars appear to have positive scrub radius.