IT might seem harsh but i would get new guides and have them installed properly and to the tolerence i ask for by a better firm, it will mean having to recut the seats but just think how pissed you would be having to take engine back out tear it down , buy a new gasket set etc , now is the time to bite the bullet and get it done right and put it down to experience
I had a reputable firm ( stan stevens) do me a rebore many years back i gave them the barrel and new piston told them the tolerence, they did the same thing and made the bore tolerence bigger as they new best, the result was my pistons ring end gaps were beyond what yamaha stated as maximum , the bike smoked when put back together and was probably worse than it was when i gave it to them, i then had to get my barrel re sleeved by SIP and rebuild the top end again, if this sort of thing ever happens to me again i will be looking to get even rather than swallowing the loss as a bad experience
pete