I've finally gotten myself moved in and have my new shop mostly setup here in Dayton. Before I moved I was able to complete many of the parts for my new machine, and I'm hoping to begin assembling it over the next week or two. I apologize to those who have either messaged me and not heard back, or who have recieved delayed responses. I've been trying to catch back up on PM's and e-mails.
The LC50B is a modified of version of my last machine. One major change with this machine is that it is being constructed entirely with mdf, hdpe, and aluminum parts. While I still prefer the strength of plywood, it became very difficult to find good plywood with uniform thickness. I found myself digging through as many as 10 sheets at the lumber yard for every 1 good sheet I deemed satisfactory. I've made other changes to aid in ease of assembly/disassembly as well, such as adding dowel pins to the stacked sides and using captured t-nuts to all mounting points.
The new design includes mounting points for my 4th axis, as you can see in the picture below. As soon as I get the new machine rolling I'll start working on the 4th axis.
If anyone has any ideas or suggestions for the design please let me know! My models, albeit incomplete, can be downloaded from http://www.comptonsoft.com/cnc/LC50B_081007.zip
Be warned, the download is ~12mb.