Just suppose I may have cut a steerer a little short and need to lift the front end of my hardtail a little…. I've got 90mm Raceface AM Evolve Stem and Deus low rise Bars currently, but reckon I could do with about another 1/2"" rise. This lot is on a Price Albert, which is feeling a little twitchy heading down hill on the rougher stuff right now. I've got a set of Revelation forks.

Geometretically (???!) is there likely to be any issues substituting a couple of extra spacers with more rise on my bars and stem?

cheers

Why would it make any difference? Substituting a couple of stem spacers for a higher rise stem that is… That's how they used to alter bar height in the "olden days" 😉

Cheapest option may be to buy some higher rise bars though…

yeah, just looking around a set of risers might be worth a go.