The dust cap on the 30W100 is an integral part of the cone, or at least on mine it is. Also, the small indentations surrounding the 'dust cap' are there to locate the cone on the voice coil. You probably don't want to mess with that. I don 't know what your Speakerbits kit includes, but you may want to protect your investment by having them professionally reconed. The Dyn kit includes new foam, cone/dustcap, spider and voice coil - pretty much giving you a new speaker. Replacement is done with an alignment jig to keep the voice coil aligned in it's gap. Madisound did a pair for me. Not cheap, but then you did say Dynaudio.
Foam surround replacement question
My woofers' (dynau 30w100) surround have rotted. I ordered a new set of foam surround from speakerbits, Australia. I just discovered that they didn't include the new dust caps. Is it ok to replace surrounds without replacing dust caps? Their instruction didn't mentioned anything about dust caps either.
Suchart
Suchart