kwikee level best levelers

I Have the Kwikee ones on my 08 Sunova but have only used them a couple times maybe don't know the proper way to use them tried couple times they bounced the coach around and raised it off the ground,tried the individual movements but no lites and nothing moved!Afraid of getting stuck somewhere with the jacks down!50 years of motor homes and few trailers I think I found the answer cut bunch of 2X10s as in the past and carry them never had a problem getting off them and no worries about the unreliable jacks!!What a waste of about $4K yet all the ones I see on the lots all seem to have them!