That seemed to help but my wife decided to use a putty knife along the whole seam and this did the trick with no damage. Thank you for the quick reply Leland!

I have read that I can place a freezer bag of sand on top of the horn to reduce ringing. Is this an effective non-permanent solution? Maybe tying a piece of string around the horn to prevent shifting/falling off while being moved?

Next question. Am I pushing my luck??
The caps do not appear to match too well, suppose I should just totally recap? Needs to equal 21 nf for the woofer and 8 for the horn. Do the voltage capabilities of the caps have to be at least 50 volts? Is a higher volt cap going to adversly effect the sound or just be overkill and cost more?

More on caps: I am more of a old school type and would probably wish to replace with the original to retain the original sound. As this part is not exactly available toll free from Heathkit, where do I look and what brand/model should I be looking for?

Thank you for any help. You guys really know your stuff here.