My gripe with the ipro is no shut off, you have to unscrew the battery cap. Stacked batteries, kinda risky and your batts wear out at different rates and you have to remember to rotate them. That little LED is always lit resulting in battery power being lost even though its minimal. The wheel is a bit sloppy looking with the paint blobs on it.
The lava tube has a shut off feature, no lights eating your battery when not in use, does not use stacked batteries, is much more compact compared to the ipro, has a display that only lights up when you need it to and is cheaper.
Just my opinion. best of luck
Neon