No problem! If it helps at all, I had well over 65K on the first set before the new build. Tore them down, greased them, and those are now on another rig still going strong.
I am a firm believer in the JJ's being the best dual-purpose joint out there. Very little maintenance, and they last forever. -ok maybe not forever, but almost.
I put the 2.5" 1.25" shank JJs on the new 3/4 link build. Very happy with them as well.
Word of caution-do NOT over-grease them!!! You can kill them quick doing that-this is a case where more does NOT = better. A little goes a LONG way.
Best of Luck,