I'm planning to lose 15 - 20lbs this winter myself. Most of that will probably come off by staying away from late night vodkas :}

dvw - I believe straps are allowed. The rules state the window "must operate in the OEM fashion - IE: go up and down". I like the idea of the strap or even power assist as it can be a PITA to roll up and down once strapped in. I'm going to check both options. I am a little concerned about power as it might lead to wanting more creature comforts like A/C!