If it doesn't fit...force it! If it breaks it needed to be replaced anyways!
Lasers:
Alpha HP 225 - 532nm
S3 Spyder Arctic - 445nm (not metered yet)
DIY 445nm (Jayrob 18650 Kit) - 900mA's (not metered yet)
Mini Pocket Laser (Jayrob build in '08) - 405nm PHR-803T w/405-G-1 Glass Lens Mod 125mW
Viper Series - 523nm @ 75mW
WL Core - 523nm @ 15mW (Modded)