Wow! I can't imagine going through one back surgery let alone 3! My father, brother and myself all have back problems stemming from too much use and abuse. We used to sell construction fabrics that you place on the ground and tailgate rock onto to stabilize an area or create a near permanent driveway (we haven't replaced rock in our driveway in 22 years). The fabric was in rolls 12 foot long and close to 125 pounds each. We would get in a semi with 150 rolls every few weeks with usually just us to unload it. We all made deliveries all over our state and usually had to unload it alone. Great way to see the sate, but as I get older the more I regret doing the work.

Hope they get you back together ok and riding again. Those skooters are fun, I ride an antique - a 1978 Suzuki GS750.