BoneDoc:

The comparison was only for a 90 sized bird. There is absolultely no way you can compare 50cc class gas to electric in cost.

BTW, I used OS BGX1 2.2 in my fisrt PW extra 300 and I used 2cases of wildcat 15% in one month with the cost of $120. I immidiatly swithed to DA50 and gas for the power and fuel cost reasons.