Agree...I wouldnt get too carried with mods to the Swifts...they are only going to lessen their resale value if you ever upgrade...and adding felt around the tweeters is largely a myth...true..Spica tc-50s used felt...but their spacious sound was more due to internal componets than external..cheers..however...if you are dead set on upgrading...call Meadowlark and get it done in a professional manner...the Swifts are not speakers to start out modifying if you have never done it before...
