Cultured stone requires a type S mortar for interior application but the home center has no idea what this is. Make it yourself by adding 6 heaping trowels of portland cement to a 80 lb bag of ready-mix mortar. Add water and yur ready to mud.

For exterior applications, use a type M mortar. This can be made with 6 trowels of portland and a 50/50 mix of a liquid bonding agent and water. You should only make a 1/4 batch since the working time of the bonding agent is about 30 mins. See the directions on the bonding agent for working times.

The self-locking hubs look like a nightmare to take apart and adjust. It isn't bad at all. Seems like every 12,000 miles I have to go in here and tighten them up. Here's the steps :

1. Remove front tire.
2. Remove caliper. Support caliper with wire so brake hose is not strained.
3. Remove 3 speed nuts from outer hub housing.
4. Remove outer hub housing. Check the housing O-ring for nicks.
5. Remove C-clip and washer from axel shaft.
6. Remove auto-hub unit. May have to wiggle unit since it is spring-loaded.
7. Remove two thrush washer.
8. Remove raised small T-key.
9. Loosen and remove wheel bearing nut with large pliers (2 1/4").
   Stop here if just tighting the wheel bering.
10. Remove outer bearing.
11. Slide front rotor off shaft.
12. Remove inner grease seal from rotor with pry bar or chisel.
13. Remove inner bearing.
14. Clean bearing and races. Inspect for wear.
15. Pack bearings.
16. Install new inner grease seal.
17. Reassemble in reverse order. The auto-hub unit is a bit hard to span over the axle. A light tap with a block of wood works well.