It works. I would use a hard paper dome instead of the chrome...just call bill at GPA he can do it. Or at least use parts he recommends.

I really would recommend getting 418 instead as it converts directly. Or 422, same core. Brother has a single for 25.

421 core is also same as 423.

418's actually work well if you have a sub...I cover the shiny dome with a felt one, bfish suggested vented paper instead....