I used to use almost all of the Tesoro products from mid-'83 until November of '04 when I quit being a Tesoro Dealer, and the Golden Sabre 'series' used to be excellent producers when Coin Hunting. Of course, part of the credit for that is back in the latter '80s and into when the last Golden Sabre version was made, there was still a lot of coin-finding opportunities out there.
There were three Golden Sabre labeled models and I'm not sure which model you had or the period of time you were using it.
The 'original' Golden Sabre was produced from 2/'85 to 2/'92 and had the control housing mounted on top of the operating rod. The main thing it lacked from the following models was the 2-Tone Audio. When it was released the Royal Sabre followed in 4/'86 thru 9/89 and it had a little more in features and introduced the 2-Tone audio that helped with the Notch Disc. circuitry performance.
The 2nd Golden Sabre model was the Golden Sabre Plus, made from 3/'89 also through 2/'92, and it had an under-slung control housing and featured the Dual-Tone audio. It was also a bit unique as it was the only Tesoro designed to operate at 15 kHz.
The 3rd Golden Sabre II was produced from 7/'92 to 5/'99 and it also offered Notch capability with the 2-Tone audio feature. It differed from the first two Golden Sabre's as they were in the metal housing, but the Golden Sabre II used the ABS plastic housing like the Pantera. Matter of fact, the Golden Sabre II IS a Pantera, but with the circuitry modified from a the manual GB Pantera to be a turn-on-and-go factory preset GB in the Golden Sabre II, just like the other Golden Sabre versions.
Also different with the Golden Sabre II was that it used the ED-120 Discriminate circuitry which provided a lower Discriminate setting than the other versions and that gave better detection of thin, low-conductive targets like thin gold rings, gold chains, etc.
By the way, as mentioned that model was based on the Pantera, introduced in 7/'90 but like the first two Golden Sabre models, it also saw the end-of-production in 2/'92 as did the Toltec 80.
The Golden µMAX [size=small](microMAX)[/size] was a completely different detector. As mentioned, there were two versions and both were discontinued. To me, those I had suffered from some glitches that, it appears, they just couldn't work out, plus in today's market they were priced in a bracket with a lot of competition against more featured products.
If you haven't found a clean, good-working Golden Sabre, let me know as I have a friend who had one for sale recently and might still have it around.
Monte