Fizz,
I wanted to get AWAY from stacking wooden blocks up to around the 18" height, I don't like/feel that it could be a safety problem with the jack leg coming off the blocks etc,(withall the traffic in and out of the TH).
I am looking for Ideas to build a Metal Pyramid type stand about 18" square, that has an adjustable center section that will extend to about 18" and then use the jack to extend the distance as required, as it was, I had to cut 2-18" tall stumps to support the front end/side stabilizer jacks, due to the slope of the campsites, etc.
Tia,
Don