Built a pair of drop-ins for a customer so I took a few shots. Yes... we stock parts even for our 2" coil drivers - I can't stand to see sub motors get thrown away (hang on E8 v.1 guys... working on updated parts for those).
* Top triple joint action - we assemble these ourselves so it's all done with heavy duty CA glue like the Z v.2 and Nightshades.
* Side view. Surround is a little bowed from sitting in it's shipping box, the cone is straight no problem
* Rear triple joint support ring in place like the bigger SA woofers.
* Your SA-8 make a ticking sound at high excursion? Guess what ? It moved about 28mm rearward and your triple joint ring hit the top plate. Needless to say the spider allows alot of travel and it's backed by a really strong motor... so be careful!