I just got my toolcat out of the shop. I had taken it in for a few other things and asked them to find the fuel leak. My fuel line (outlet) grommet leaks all the time so they replaced it and sent me on my way. Because the fuel tank wasn't above half full, they didn't see that it has another leak.
Personally, I have had other Bobcats with leaking fuel tanks. I opt to replace them as I will probably do with the Toolcat. I'm taking it back this week. This tank removal doesn't look to difficult (looking in the service guide for a B series). If it is being taken out for repair, I might as well replace it unless it's a very minor repair. It's frustrating because it was in the shop for nearly two weeks and nobody noticed the bigger leak.
Hope you have better luck!