The kart most of the younger Merlin guys are on is the MR29 I think. I helped develop the original version of that kart when they first brought it here when I was driving with them. It was originally designed to be a good Yamaha/KPV kart, and it was. I won my first national races on that kart. I’m sure it’s been through quite a few changes since I was on it, but it was a good kart for sure. I believe Lemke runs it in TaG as well, so it works for him.
Like I said, there are tons of karts out there that will work, as long as you know how to drive them.