There is guide marks on the part which holds the laser diode. It's not that hard to place it on the right position. The worst thing to adjust is the lens position as you have to bend the metalic body of the lens to adjust it to the new position of the laser diode ... lol
So since you can bend the lens to compensate, it's not really THAT critical... Yes, having tools for helping with the position of the laser saves you a lot of time but still are not needed if you know what to do to compensate the miss-alignment on the laser diode
Now a wonderful tool to have would be a tool to measure the laser output power versus power consumption, which would allow me to discard defective laser diodes without having to mount them on the laser units to test them...
SCPH-10000_GH-001 SCPH-15000_GH-003 SCPH-18000_GH-008 SCPH-30001_GH-005 SCPH-30000_GH-016(V4) SCPH-30001_GH-010(V4)
2xSCPH-10190, 2xSCPH-10350, 2xSCPH-10280
"**** j0 hackers!"
-Sjeep (As seen on TOXIC OS ELF...)