Just as impoertant if not more impoertant is the exsact side and down thrust, and looking at your model it doesn't look like youv'e got any side thrust. I use some petrol pipe hose of a car to make washers behind mount. cut them different thicknesses to guess the right amount req'd then simply tighten up any bolts a tad req'd at the field to get it spot on. No need to dismantle bolts etc, + prat about with washers, it quietens down the noise + vibration also.