Yeah, you can use the DDL but it has it's own problems and isn't as efficient as it could be

I still haven't tried the 7135 chips but I'm sure you could scavenge chips off of the DX ones and make your own driver on a piece of stripboard (add diodes and capacitors for safety even)
Might even be able to make it small enough to fit into an aixiz module lol.
@the bucketmouse:
That is what we are discussing.... 4 7135 chips will give you 1.4amps, good power for a casio diode.
I'm still not sure about the driver's stability though, LEDs are a lot more robust than even the casio diodes so I don't know if they will toss voltage spikes at it or not.
A 16v 47F electrolytic cap to take the big spikes and a 1F ceremic plate cap to smooth the little stuff might increase the diode's longevity by a lot if the drivers on DX are too "messy".
Just solder them onto/near the diode (parallel)
I am not an expert/have not tried any of this stuff/not responsible for you killing your diode.
This is all speculation and I don't have the components yet nor the oscilloscope to confirm/disprove these ideas ^_^
@Horhay: Turning down the pot won't work because there would be too much current flowing through it, you would need about a 3 watt rheostat to handle what it needs for resistance and they can be spendy. The lasing threshold of the 445s is about 200-250mA, below that and it is very dim, above it and it is still VERY dangerous. IE: Wear safety goggles around it because it can still do a pile of damage!