Anybody using a REVOTEC boost gauge? whats the quality like & do you find it accurate?

 

i had one on my classic only problem i had was the light kept popping on it

 

they dont look a bad gauge mate, im currently using a electrical one & its quite abit out so im going back to mechanical, just looking at my options for a nice 52mm ive seen the odd hks, blitz on ebay but never look in good nick & go for stupid money