Hi all. Does anyone know the exact dimensions of the Devon Roof springs? I need to replace the springs in my "unusual" pop top. It was made by a 1970's now extinct company called Whytch". I have in the past just placed some aluminium spaces to boost the spring compression but sadly this is no longer working and I need to replace the springs. I need to source some new ones and am hoping these....http://www.justkampers.com/devon-roof-springs-vw-t2-bay-1967-1975.html will do the job. I need to know the dimensions first. I need to know OD diameter and the length. Thank you.