Let's me use my spare tripod with my AZ5 mount providing a very stable platform for my smaller pick up and go kit.
As others have commented the azimuth post needs to be off the tripod as the locknut gets in the way. Not a problem for my setup as its not needed.

My NEQ6 mount is now on a pier so used this Astro Essentials 3/8" Photo Adapter to connect the NEQ6 tripod to my new Star Adventurer 2i. Very solid well made product and a perfect fit.

The adapter is almost perfect for allowing the Star Adventurer 2i Pro to fit an HEQ5 mount. I say almost because the adapter itself *has* to be fitted to receive the N post on the HEQ5. However, when you then screw the equatorial head of the SA2i P unit, the polar alignment then faces south instead of north. There are *no* adjustments possible so you have to rotate the HEQ5 tripod through 180 deg and accept the N post facing south! Weird! Hence 4* instead of 5*. A simple adjustment facility would have made this perfect.

Having just replaced my failing NEQ6 mount with the ZWO AM5 I wanted to repurpose the EQ6 tripod rather than shell out for the ZWO tripod. This item works beautifully - yes you have to remove the dowel from the tripod but it provides a very solid base for the AM5. First light last night and very happy to see average guiding in the range 0.20 to 0.25 RMS with this setup and WO Redcat / 2600 MC Pro atop.

Sadly the adaptor neither fitted my SW EQ6 tripod, nor the EQ6 mount head for my SW portable pillar / pier. But there is a solution – Please read on.
In both cases, the adaptor’s inability to accommodate the dowel used for mount azimuth adjustment is the problem.

Once the dowel has been removed, the adaptor performs otherwise as hoped, but its failure to fit an EQ6 head while the standard dowel remains in-situ is somewhat irritating.
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With the EQ6 tripod, the presence of the locknut at the base of the dowel prevented the adaptor being fitted.
In the case of the SW portable pillar / pier. there is no nut, but the dowel proved too wide for the groove in the adaptor and the groove was probably not deep enough either.
The adaptor would either need to be redesigned and modified accordingly, or the dowel can be removed, which seems ridiculous, since the adaptor has the appearance of being modified to accommodate a dowel, while failing to do so.

purchased adapter for my eq6 tripod/ioptron smart star cube mount, the tripod with the smart star is absolutely rubbish. The lock nut on the Azimuth post of the eq6 pod hinders the fit and the lock nut needs to be removed, a few turns of ptfe tape allowed the post to be refitted snuggly without the use of the locking nut.

Had to flair out the bottom of the cutout to accommodate the dowel locknut on my Skywatcher Eq6 - R mount so the adapter would sit flush on the base. Once I had done that the wedge fitted perfectly.

Does exactly what it is designed to do. I used mine to mount my Az Gti head on my spare EQ6 tripod that had been sat around for years. The tripod, while overkill for the mount head, totally transforms it and makes it more stable. The mount head is now defiinitely not top heavy and I use with confidence knowing something isn't going to topple over.

Got this item to fit on to an eq6 mount. However, my tripod's location stud has a locking nut which stopped the adapter from sitting flush (by about 3mm). Even removing the locking nut didn't work as the stud (by the way these are genuine parts) is too long to fit the cut out on the adapter. The only solution was to remove the location stud completely, which defeats the reason for the cut out to be there. - I can work with that without bothering to send it back.