Quoted from Mk1Mod0:
Meh, its been done before.
Maybe, but quality and effort says a lot more than "has it been done before." That's why HEP is expensive, and I wouldn't even charge someone 200 bucks to do a playfield swap.
Frankly, I think a clear bingo is going to be a lot more interesting than a clear regular pin. I've seen pictures of the insides of bingos, but my only thought was "I'm never buying one of those, way too complicated to figure out!" Seeing one working might change my mind?