I’m thrilled to see someone else looking for a solution to replace the Form 1+ laser. Maybe we can help each other.
I can tell you for sure, do NOT buy that first Aliexpress link you posted:
I bought one and it did NOT work. First, it put out too much power, and actually burned right through my test sheet (I’m also skeptical it even has a photodiode for feedback). Then, it stopped working altogether. Returning it has proven near impossible, despite assurances from both AliExpress and the seller that it could be returned if it didn’t do the job.
Here’s a diagram and some measurements from my original laser that might be of help: Aftermarket Form 1+ Laser Replacement. The reply from @Marshall_Banana was very informative.
I wound up buying some of these, and am waiting for them to arrive from the UK (I know, it’s silly ordering from overseas, but another user said that exact one worked for him):
I believe the extra leads are for the photodiode, which is used for feedback - on my laser it looks like the light goes through a beamsplitter before leaving the module that sends a portion to a photodiode to monitor actual output (in realtime?).
I’m a little concerned by your comments about disassembling the module. I haven’t attempted to rip mine apart yet, and would be super grateful for advice from anyone who’s done it already.