Hi Ralph,
Good to hear from you!
The Herbie’s I use are the stud gliders and they have no point/base.
Below are a few pix. of the modified frames along with one
shot of a stud glider.
Roger had his metal fabricator make up the extensions and then shipped them unfinished to me where I had a local auto body shop
paint them. I supplied the shop with one of the metal caps from the frames so they could get a good color match. I had a few issues with fitment at first but was ultimately able to get them installed.
Best,
John