I have a cheap Montana Les Paul which I upgraded with a Shadow pickup in the bridge.
I though about re-wiring it,will it improve the guitar's work?
if your guitar is a real cheap brand and you change yours pots and **** then yeh you might notice a difference but mainly it will come from the pickup
Rewiring can do wonders if you change the shematic. I find typcal wiring diagrams to be a bit.. bland.. <'< But then again it's common for me to have atleast a pair of phasing switches on my guitars. u'u

Meh, whatever you wan to do! u'u