The standard backstay tension adjuster was nearly impossible to handle by hand with it's 1:16 exchange ratio. We wanted something that was lighter in weight and easier to handle so we asked Harken in Sweden to come up with something for us. The result was a 1:48 ratio exchange adjuster with Dyneema lines. The backstay in it self is still the original one in steel wire. All fitting was done by us so we have to say that this was quite easy to do without any professional assistance.

Update 2020-10-23:
The backstay was changed few years ago to Dyneema. I also like to add acomment here regarding the "red rope". Dont buy it before you have fixed everything else. Depending on how your final settings will be, length of the ropes used between the blocks, the lenght of the "red rope" can bee too much or too little. I dont know how to calculate the need of the "red rope" in advance but i know for fact that if you change something in the backstay or the lines between the blocks, it affects the "red rope" a lot. Use some old rope untill you are done with everything, it will save you money and a hassle of having alot of rope at the steering wheel area.

57 mm Carbo T2 Single Block (Soft-Attach Block)
Brand	Harken
Product no.	2152
Sheave dia. (in)	2,1/4 (57 mm)
Length (in)	3,1/16 (79 mm)
Weight (oz)	2 (57 g)
Max. line dia. (in)	7/16 (11 mm)
Max. working load (lb)	792 (359 kg)
Breaking load (lb)	2380 (1080 kg)

Delivered by Harken store in Stockholm (click to go to website)