lol, I wasn't going to get into a shouting match with them so I was just going to ditch this thread altogether. I still firmly believe that this is a 60cc plane, like the EF Yak is. With that in mind, the DA85 is still a natural choice. Once you've learned and fully abuse this airframe, move up into something more expensive. Stay cheap on the airframe upgrades and use it for what it's worth: a gas engine trainer.
If what you have is the DA50 and you're looking for an airframe, then I'd highly consider the
3DHobbyShop 85" Katana. it is easily one of the best 50cc offering out there right now, coming in at less than 15 lbs with gas built STOCK. It also can withstand a lot of abuse as my 2nd video shows
3DHobbyshop.com 85" Katana VIDEO
But since you've already have that airframe (and I have HAD the airframe myself), my advice was tailored to that need. You can ignore anyone who told you to ditch the airframe for something else. It' s not a bad airframe at all. It's big and it flies quite light even at 17.5 lbs. You'll need something like a 20% rudder-aileron mix and around 10% rudder to elevator mix. Other than that, it harriers great and it has a ton of rudder surfaces. My only reinforcement advice remains, reinforce the firewall.
One more thing that will make assembly easier is to swap out those wing bolts with some thumb screws (like the one Hangar 9 makes for their ARFs-- an Extra 260 or Showtime 90 wing bolts will be a perfect fit).
HTH,
Josh