I got an email from this vendor.

Lasers
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1

I got an email from this vendor. Ali I having a sale tomorrow and this one will be offering many items at 30 % off. Could be a good opportunity for this looking at upgrading lenses, mirrors and other parts https://m.aliexpress.com/store/storeHome.htm?storeNo=1513187&tracelog=store2mobilestore

2

the laser tube is the same size I think - the other stuff you have to watch. i wonder if any of those controllers would work?