I'm sure that everyone who posts here regularly already knows this, but it is something I just recently found out: that high pressure manifolds should be matched with its accompanying spindle.
Unfamiliar with that tidbit, I spent two days trying and failing to balance my new HP manifold with my old spindle. During those two days, I lost half my hair and the remaining half turned gray. They reminded me of my opening days with the et2. But it was worse, because after a year with this arm (I own 2 of them), I believed I had the hang of it. The thought that I was back at square one truly disturbed me.
Luckily, Bruce is always quick to answer questions. The bad news is that he is uncertain whether he has any spindles to match with my manifold. :(
This is rather unfortunate (if it stands) because I recently acquired this
160lb bad boy precisely to run the HP manifold. I had been using its little portable brother, the Timeter pcs 414, to good effect. But Ct0517 has argued the merits of 'better' drier air, so when the larger model with internal drying system showed up practically next door to me, I pounced on it. These things require maintenance and it took nearly month to acquire parts and days to deal with a nearly inaccessible leaky valve.
But in the end, using it to run the regular pressure ET 2.5, it was worth it. Strongly recommended.