Re: replacing 1460s
I agree with Cropcutter. The electrical issues were solved within the first year or so of the 2100 Series. After al, it was an improvement over the 1600's in electronics and ergonomics, not a complete new design. Yes, that does go for the separator innards, too.
It's my opinion, more people stay away from the 2100's for the same reason they avoid the 1600's. They are simply an older edition, and many want to stay more current, especially to tailor their finances, loans or whatever. It does not mean the 2100's are flawed by any means.
Overall, after just shy of 30 full years, I look at our Axial-Flows as not only an outstanding design, but an industry standard. Say what you will about an "aging" design or style, but as I keep saying, "Don't fix what's not broke."
Really, instead of the new design , I'd have rather just seen a bigger Axial-Flow, putting the same old, reliable design to the field, with as much more capacity as the 2388 has over the 2366.