I need some help/advice/opinion about a repair I had done to my early 90's Mustang 930A. It had a leak, hydraulic oil coming from the reserve tank (tank behind the seat). The shop I took the machine to repaired it with a fiberglass patch. The couldn't find a replacement tank new or used and it was cracked around the fitting. The tank wasnt metal so it couldnt be welded. I feel uncomfortable with the fiberglass repair and the bill is $1950. Is a fiberglass patch typical for this type of thing and if so should I ask for more than a 30 day warranty on the repair ? The shop typically issues a 30 day warranty. I didn't authorize the repair and probably wouldn't have because my own personal experience is hit and miss with these types of repairs, however i am not a pro when it comes to epoxy type patches. The bill covers muffler replacement ($500 part + $'s in labor for light modification due to inability to locate a replacement new/used), which caused the crack according to the mechanic, purging and bleeding hydraulic system as well as the tank repair. Thanks in advance for any help