Sorry, I haven't replaced the tantalum caps. I did replace all pots for Bourns multiturn pots. This made it so much easier to calibrate the thing. The old things where horrible.
BTW I had one with the broken trigger output, featuring unknown unobtainium transistor pair. One wasn't broke, and I tested it with the Peak Atlas DCA75, and found it to be similar to the 2N3904 as I remember correctly. Replace both, and it works great ever since.
The buttons on these things tend to feel sticky and noisy. I rinsed and cleaned all keys with IPA, and after years they still feel as new.
Also if you have the sweep option, check the sweep input connector on the back. Mine had corroded and had a bad connection. As a result the low frequencies tend to drop on the output (when not using the sweep anyway). Took me ages, until I found the sweep input circuit on the service manual was connected to the low freq circuit, replaced the connector, and it's working ever since.