Hi Spectra Sport 96, welcome aboard !
I own many Spectra Sport Kites and 3 Nuclear Reactors ! I reframed my 3 Nuclear because all original SkyShark fittings were damaged.
I did order the following so far:
APA LE Connectors APA D
No, that's to big for the original SkyShark 7P no tapered tubes of your Nuclear Reactor !
You have to order APA "C". Just put them in boiling water before insert into the leading edges and that will work perfect.
APA Center T 6x7mm (This part will require me to change from outer ferrule on lower spreader to internal .240 ferrule)
No, keep the original SkyShark aluminium ferrule but replace the bad SkyShark Center-T by a vinyl ferrule !
APA 7mm & 8mm Molded Stoppers (Doo Hinkeys)
Why don't you keep the original stoppers ? Are they damaged (it happens, I know) ? But I would replace them by cuted vinyl ø 7 mm endcaps.
APA Stand Off Spreader Connectors APA 312
No, to big again. Use APA .250 and boiling water !
Good luck for your reframe of this nice kite (he won the Team WorldCup in Le Touquet - France with Team Tsunami in 1994). I was there !