I second Jeff at Bend RV Repair. He’s also an ex Beaver employee, does excellent work, and though busy is more likely to work you in sooner than BCS. He’s just across Boyd Acres from BCS.
You didn’t say for certain what area of the country you are in, which would help others make recommendations. Also, what exactly is haywire, with the “scissors” slide I presume? Solenoid issues, for example, are sometimes easily resolvable by the owner; sometimes not.
Joel