I just looked at mine, and the original dustcaps are soft and are a slightly open weave fabric.  I don't think coating them with PVA or similar is a particularly good idea.  I'd keep them soft, and as close to original as possible. PVA will tend to be a bit firm when it sets, even if thinned.  A rigid dust cap will effect the response in the drivers upper end, and could negatively effect the crossover to the 75mm dome mid range.  Best bet - keep them as stock as possible.

oldtableman wrote:

I obtained the schematic for this exact model, and there is an error. Since yours are apart, you can see what is incorrect in the official schematic. Take a look at the wires colors and lengths going to the tweeter. In the schematic, it shows the tweeter wired in the same polarity as the mid, and woofer.

However, see the wires!  They are cut so that the tweeter is wired in opposite polarity from the mid!

In fact, if you try and reverse those leads, you'd need to lengthen one wire and cut the other. While this seems intuitively correct to keep "first order......" crossover topology, it actually will result in the tweeter and mid being out of phase at the crossover frequency.  Try it if you wish - there is a very audible suckout in the upper mid range if you wire it, per the crossover schematic.  Someone just made a small typo..

I have the schematics well and I just checked the