Looks nice, I hope it gets funded but minimum distance would seem to be 6' which might be a bit far for some UK digs. It's good that there is increasing impetus for open/hackable laser distance measurement systems.
I've now bought one of the UNI-T UT390B chinese LDMs for ?38 delivered (!) from dealextreme. Works fine in my front room. Small, light, robust, but probably not very waterproof. I'll take it to bits for a proper look when I get a mo, and of course take it underground and see how it works there. Then see how hard it would be to integrate with the SAP design.
I tested my UT390B over new Year in Easgill and it worked nicely, although not in particularly stretching conditions. It did the advertised 30m range. It'll get a proper workout soon on expo.
Meanwhile I noticed UNI-T do a 391A as well which is 70m range and waterproof (IP54) for ?54 delivered from China. That's probably better as a caving device. Has anyone tried one? I guess I'll go shopping anyway.
If these work well on expo I might import a few to supply UK cavers. Would that be of interest or has everyone who cares bought a distoX or distoX2 anyway so the market for separate LDMs is tiny?
I'm a very sad man who now owns 4 LDMs and is about to buy a couple more! I guess that's a lot easier now they don't cost ?250 a throw