Rebuilding the hydraulics on my new (to me) TR3 and have been doing lots of reading about DOT 3/4 versus Dot 5. I think go to silicone makes sense even though I do not have a brand new paint job. I am currently planning on rebuilding both master cylinders, replacing the clutch slave cylinder, and replacing the hose to the clutch slave. The brake hoses as well as the front and rear brakes all look to me in great condition. Clearly they have all been redone at some point in the "recent" past. In order to convert to silicone do i need to replace all the brake hoses, rear wheel cylinders and rebuild the front calipers? If so, I may just go with Dot 4 so I can try and get up and running before deciding on what exactly this TR project is going to entail. Thoughts?