[sime46]

I've ran mine with the option alloy gears which are only 1gm heavier than the plastic ones and the kit steel gears. Gotta say I didn't notice any difference. I too was concerned about the extra rotating mass but was pleasantly surprised with the results. The alloy gears are lovely but mine seemed a tad more noisy with them fitted. I fitted the steel kit gears to see if it quietened it down. It did. Lol.