Kirk, Im no pro but I have been running the Webra 145/160 for a few years and it sounds like it's lean in the middle most likely caused by a bad pump. You can try to turn the the pump adjustment in about a half turn and see what happens, shorten the pipe a little will richen the mid range as well. If you want to take take the quick way to a good running webra remove the pump guts from the back plate and throw them in the trash, drill and tap the center hole in the back plate for a pressure nipple and buy the Perry VP30 pump. You also have to plug the two old pump mounting holes in the back plate, I have a simple way of doing this if you decide to use the perry pump, let me know. I found the Webra pump unreliable at best, one hot run and its trash. If you continue to run it like this the con rod bushing will wear very fast. If you pull the back plate/ pump assem. out you will see that the piston skirt is banging on the back plate when the crank is at bottom dead center, this makes matters worse. After installing the Perry pump you will find the Webra very reliable and with good power. Your needle setting is about right @ one turn out and will end up @ about 3/4 out with the perry and fully broken in. Run the OS type F plug to keep things lit. The needle seat on the ProMix carb will wear over time due to vibration, I had to replace mine every couple hundred runs so keep that in mind if she start running richs down the road. Also the rear bearing is only good for 40-50 flights, I install the stainless bearing that Boca offers. Good air flow around the crank case helps with bearing wear as well. Hope this helps.