The M05 runs pretty much the same as the M03. I ran against one of our fast guys, and the lap times didn't differ by much. However, this chassis resists traction rolling much better, so there is potential there if you can make use of the extra front grip that can be added.
Like I said before, there are other things this chassis is capable like the separate rear lower suspension block, and compatibility with a modern ball diff. It may be the same now, but there is more potential to be unleashed.
Tony, thanks for the detailed build blog!