Greetings. I have a new Alpha Trainer 46 DSM2 with the Evolution Trainer Power System that I have had for about 2 months and have recently had a few problems with the engine. When I first got the plane I flew it around for at my field a few sessions stock and it was OKAY. I did have to retune it every single time I flew it so I did some blogging and everyone said to get rid of the flywheel and 3 blade prop. So I took off the flywheel and put on a 10X7 prop and it ran really good after a tune with the new changes and did okay that day. I have flown it twice since and have had nothing but problems with it. First off i could not get it to go from idle to full throttle at all, it instead goes from idle to running rought then after about 3-6 seconds it runs full. Today it did the same thing but now after it reaches flight speed or full throttle the engine pulses and has air bubbles in the top of the fuel delivery hose, ie the pulse. It also has also developed a into a leaky engine, but yeat i have check all the screws. Im thinking its the engine, but not sure. I also thought it sould be the fact that the Alpha Trainer had no foam around the tank. I did a pressure test on the tank and it is solid so I do not think its a leak nor do a see one. I have thinking I should just replace the engine and tank with a Super Tigre 45 ABN. As for a new tank I am not sure what to get in an equal size to the stock one in size and this time run some foam around it. If you have suggestions let me know I really like this plane and dont want to lose because of something dumb.

I was also wandering as for removing the low idle adjustment limiter i am not sure how to do this. can you guide me?
i got the high idle adjustment taken care of i just knocked the small pin down.