This works a treat, literally just did mine tonight and it makes all the difference for comfort. The measurements I found worked best is 4mm plate aloy sized at 40mm 38mm 50mm 38mm 40mm. The two 40mm measurements are what bolt down, the two 38mm measurements are the up stands and the 50mm measurement is the top side but that would also depend on the rubber she's you buy👌 I hammered my down slightly to get it snug in the new holder.
This is awesome I just did the same thing except used 10mm sockets that happen to be an inch in length to use to prop the seat on. Just for now till I can grab some rubber chair covers. But I am worried about rain now…if it rains it will be able to drip right under the seat
Looks like a piece of cake to do this. Usually I grip the "tank" with my knees to keep me back and stop me from sliding forward till my package grounds on the tank.