Nice tweak Votart. Looks like an "ultimate" solution to me. I had tried a similar "two for one" cannon between red and grey dillos (like in my 1944 solution), but couldn't find a position that worked.
For next challenge I have a level built, but not generated a POC for it yet. I'll work on that now. I'll post it later today (around 19h00gmt) if ioncorpse can't get his PC to run AR again.
If anyone else has a good challenge they would like to post, please go ahead. It was such a close result that anyone could have won......