Hi Jason, as there are no bearings in the front roller set-up, both the roller end-caps and the roller axle rod wear over time....causing some alignment probs, the rod can be repaired and new end-caps are still available, if that indeed is the problem.

Here is a pic of the alignment tool;
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2011/10/full-1147-3777-dscf1356_medium.jpg)
The idea is to slide the tool back and forth, with the underside of the cup-head screw in contact with the top surface of the bedknife and the rod itself in contact with both the rear and front rollers. You will soon see if it is out of alignment.
You will notice that the screw is not placed dead centre of the tool, but closer to one end, so that it does not contact the surface beneath the rear roller. The hole in the rod itself is threaded to allow for adjustment and the nut just locks it in position.
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2011/10/full-1147-4066-dscf0729_medium.jpg)
The quote of $150 is reasonable for the services your engineer is performing, in my opinion.
Hoping this helps,