so i went and bought standard fd3s shocks.
so by looking at the picture they are about 100mm shorter than sentia struts, obviously different top hats(easy solution is just to replace them with your ones)
front shocks are pretty similar(fork) bolt hole is slightly smaller then sentias, and there is no brakeline bracket.
rears are again shorter than stock shocks and the "eye" is much much bigger than fd3s shock...
well im definately not going to waste my time with them and just save up for custom suspension or if i can find a mint set of adjustables on AYJ ill buy them...
plus sentia is about 400kg heavier than rx7 so you will be looking at different set of springs...
so in my conclusion those shocks wont work in sentia unless you are an engineer and is able to make it work. other wise it would cost you an arm and a leg to do it...