owl
Turbocharged
I thought the Sargent and Russell were bespoke alterations which would mean sending the seat away, no?
Sargent is a totally new seat, (and very firm) but you have to send a standard seat to California for Russel to rework it. Cheapest method is to buy a replacement seat on ebay.com & get the seller to send it directly to Russell for you.
Have a perusal of their website http://www.day-long.com/ You have to supply your weight, height & inside leg measurement then some photos of you in your normal riding position, and they make a bespoke seat made to measure. Comfier than my sofa.