Has anyone had to replace the packing in there Barker Exhaust? I have 150 hrs on mine an almost all the packing has blown out. I want to go with something better than come in it originally. Anybody know of a better packing? Also i guess you have to have a short allen wrench on the bend to get two allen head screws out the angle is short and a regular allen wrech wont work. any suggestions would be appreciated.