ILIKEBIPES.... I like mechanical 90 degree retracts but not 90 degree rotating retracts... they have ball links like the Hangar 9 Corsair and Hangar 9 P-40... They do work well for some people,..and not very well for others... Just depends how well you set them up and how hard one is on them....... some people are fine with the Hangar 9 Corsairs with stock retracts others hate them and curse them...
It is really tough to say... I just say..do what works for you.... THey are nice rotating mechanical retracts and they come with or without the struts.. I like the ones with the struts...
Hope this helps...
Thanks
TOMAS