Solved Firmware changes?

Hello, I'm new to the forum and I bought a R1+ last week. I read the information about the compiled firmware being available by request, but I'd like to get the Arduino source so I can make changes myself. I am currently using a Reprap LCD (4 lines) which works without any changes, but I'd like to add the full graphic version. Also, I'd like to up the max temperature for the bed as I only print with ABS and it maxes out at 105C. I understand there are differences between the R1 and R1+ and won't mind entering those manually in the source if they are available somewhere.

 

Thanks Mark! I'll check it out.