Phlatboyz share some Phlat Newz and a video documenting some of the development work on what will be the newest Phlatboyz machine, The H-Bot Pro! [pre] <iframe src="http://www.ustream.tv/embed/recorded/18563299" width="608" height="368" scrolling="no" frameborder="0" style="border: 0px none transparent;"></iframe> [/pre] The H-BOT video http://kits.makezine.com/category/tools-workshop/
No just need time for the resins to develop as well as drop in price. We still needed a 3D printer so we decided to make an extruder style for making large parts that do not require very high resolution.
There are kit priced extrusion style that are capable of very fine resolution. <100 microns which is what most commercial ones state
What sort of rails is the H-BOT using, I've been looking for some aluminum extrusion that could take a roller bearing and haven't been able to find anything, what you have looks perfect would be very interested in finding out your source.