If your the least bit handi with your hands and tools it's a VERY easy ream. Just don't deepen the rim cut and clean the reamer and the chamber of chips every turn.
A large tap handle helps too. Just go slow and you will be done in minutes, Really!
If you have a octagon barrel Steve brings up a good point. As far as value decreasing or being halfed I doubt it would be that much but the barrels are way over priced anyhow. If you do this it's value to you will be increased far more than any possible monitary value lost IF you sold it...
The maxi is a wonderful caliber and one of the great things is you can still shoot mags and specials in it!
CW