MF,
all I did was fit a new air filter, to be honest I didn't even use the self propelled today I just pushed it I didn't notice it being all that heavy. I might be working on the other one you mentioned on ebay and doing the conversion on it although he wants to do the 4 blade not the 2. The one I was using today has been handed back to the owner so I won't be trying the 2 blade conversion on it. By the sound of it it probably won't be long before they start popping up everywhere
