Weldguide III

Grahammy Uk
Hi guys, any experience of Weldguide III...
I want to retrofit on IRC5 which I don't think is a problem.

Does it work when welding galvanized steel?

Also, I have to weld a powdercoated tube to galvanized steel. With the weld having to burn the paint off first, will Weldguide be able adjust for that?