I tried about six different super-duper glues and none of them kept the piece of radiator hose on for more than one try. I finally got around to having 1/4" thick steel pads welded to the feet of the stand. The report is that it works well now.
With the longer eyebolts, I find that my Hills centerstand leaves both tires touching the floor. I'll write to him to let him know. His request for measurements when ordering would account for that. I guess 1/4" thick wear pads welded on the feet would be enough, but that is easy enough to check.
Dave Hills sent me these thoughts in response to my question:
" You are of course not the first one who has altered the suspension on his bike and then found that the stand is too short. I have seen several ‘mods’ to the stand to achieve a slightly greater leg-length. One idea-probably the easiest one is to cut a section of hard rubber from either a tyre or an old rubber boot and use something like “Gorilla Glue” to stick this to the sole of the feet. A 3/16” thick piece of rubber is probably all you need. An added advantage to this ‘mod’ is that it gives the bike a lot more grip especially when parking on steel plates as encountered on cross channel ferries .But I guess that you are unlikely to do this living in USA but a frequent journey for us living on a little island.
Another idea is to drill and tap the feet up into the hollow leg and then screw in a extra large headed bolt. Quick and easy but not such a good idea if you park on wooden boards or ‘posh’ tiles.
Probably the best way to get a bit more leg length is to carefully cut off the ‘heel & toe’ of both feet, then round up the ‘stump then weld on a pair of new feet. Using ¼” plate this will give you about 7/16” more ‘lift’ at the back wheel. Do remember that by increasing the leg length by ¼” lifts the rear wheel by about 3/8” or more. A good way of calculating the exact amount of increase you need is to slide thin pieces of plywood under the legs before you start altering things. Using thin plywood you can get the ideal height that suits you and then measure the plywood to get the increase you need."