If I may say something about the CRRC-pro 26 cc engine. I bought one used last year and have encountered a problem with the bearings. My experience with gas engines is very limited so please take what I am saying accordingly. I purchased mine used with bad engine bearing seals and after a lot of searching, I found out that it was a common problem with this engine. When the engine bearing seaI(s) fails, you get an air leak into the crankcase and that messes up the air draw through the carb. Also, I read that the electronic ignition was failure prone. I bought it with the understanding that the ignition would be bad and so I replaced it with the RCExl ignition anyway. The other known issue with this engine is that sensor pickup is mounted right up against a crankcase web and limits the ignition timing range. I simply ground that web off and allowed the sensor to be mounted at a further retarded ignition timing to allow easier starting. That was the other complaint that this engine required starting with an electric starter. It runs nicely now, but it is up to the buyer to decide whether to go through all that trouble and it is still not as strong as a DLE20 or similar.