In defense of Meteor,
Having not known Spike, I've found Meteor jugs to be cheaper and more readily available, especially for the 2171/372's, of which I build about 12, a year, or so.
In particular, I can't often find the 503 62 64 73's for less then a couple hundred. The 503 93 93 72's are readily available, but they're the two ring, restricted port kits.
So I spend more time with the die grinder than I prefer.
The Meteor jugs are much closer to the good old 73's. Especially with the single caber ring.
Hence my question, specific to the ports of the Meteor brand.
As long as I can find OEM 46mm jugs, for the 357, I'll scraf those rascals up.
But, like the 73's, and my favorite, the 544 25 43-02's are getting towards hen's teeth.
Thanks, though, I do appreciate the input.