Yes, more resin at the same lbs of salt as in a smaller softener, gets you higher available capacity, or, keep the same capacity as the smaller softener and reduce the salt lbs and you increase the salt efficiency. I don't think biermech/Skip Wolverton gets that but any resin speck sheet shows it.
How do you get more "headroom" (freeboard) with a Turbulator dist tube when you have the same volume of resin in the tank, especially when you can't use a gravel underbed? No gravel means more freeboard (distance from the top of the resin to the top of the tank).
How is the 2510 easier to clean iron out of than other control valves?
All the seals and spacers in a Clack come out as one piece in 2 seconds and the 2510 has 5-6 seals and 4-5 spacers that all come out and go in individually. Also, Fleck control valves have a separate brine valve, Clack got rid of the separate brine valve and its gearing and has a small brine piston on the far end of the main piston and its seals and spacers come out/go in with the main piston's seals and spacers stack. I tell my customers how to prevent iron/rust buildup.
On the freeboard, with a normal set up a 8x44 tank would have .6 cubic feet of resin and gravel bed giving 17" freeboard and a back wash of 3gpm(no upper basket)
With the turbo the same tank can take 1.0 cubic feet no gravel and lower the freeboard to 10" and backwash rate down to 2gpm.
Seals and spacers as one unit... Culligan? oh that is a pain if iron builds up ...
spacers breaking... and then one has to replace the hole cage..
Yes there are 5 spacers to remove, but if one holds onto used ones, if one gets broke because of iron build up and not coming out easy but in parts, one does not need a full seal/spacer kit, just the one.
Separate brine valve can at times be a pain I will grant you that.
Most of the time I will not use the 5600, while it is a great valve, the older timer control has no way of changing any of the time settings, the 2510,2750,2850 etc... all use the same 3200 assembly for the timer or the same SE or now SXT control..
With the cold water that I have here along with iron levels that can be 50ppm having the ability to change pins for BW/BR/RR/BF often times is the difference between a unit working right or wrong.