Sterling inferno, known problems?

[noobie]

At the momment on ebay there appears to be a site? selling secondhand sterling infernos at £30 each. I'm contemplating buying one just to strip down and tinker with

Are there any problems specific for these models to look out for?

 

[BOD]

if you're going to run with it air they need a bit of adapting/converting to run on air properly, other than that they're pretty much as solid a gun as you can get though ex site ones will be beaten up.

 

[noobie]

I was going to run it on co2 just for tinkering with, at £30 it's worth a punt. Thanks for the reply