I’ve RESOLVED the issue.
The main reason for my inquiry:
1) Lucasi lacked an adequate attachment
for adding the extension.
2) Reducing the backend weight while
extending the length was critical.
3) Offers for customized models were
too expensive.
I’ve had golf clubs that had to be re-gripped a few times. The idea occurred to me that I could take a vacuum extension tube, cut it to size, and take a heat gun to shrink wrap a tube around it. After adding a few wraps of Teflon tape to the adapter end, the extension smoothly slides on and off with a secure fit. On an 8ft table, the balance and weight is acceptable. This doesn’t replace the mechanical bridge. Thanks to all who have contributed to this success.