To clarify, somewhat off-topic:
DOT 5.0 is sillycone based. It is fine on paint. Stock fluid for many H-Ds. Expensive compared to DOT 3&4. Incompatible with 3, 4 & 5.1. It does not absorb water either. The water will eventually make its way into the bottom of the system if allowed to accumulate long enough. Switching to DOT 5 is fine, just flush the system REAL good. If I ever switched I would go ahead and rebuild my master cylinder and calipers, drain all the lines, and take everything apart to ensure no trace of the old stuff remained. YMMV. Allegedly, 5 doesn't have the same "feel" but I ran a stainless brakeline on my XLH and my brakes were plenty firm. I'm sure TCro's brakes are fine too.
For those that want to stick with a DOT 3/4 compatible formula, there is DOT 5.1. Higher BP than 3 & 4. Relatively hard to find and also expensive. Like 3 & 4, 5.1 absorbs water. Not a big deal if you maintain your system properly.
You want a higher BP for your fluid? Break out the wallet.
