DIY Speakers, worth the hassles?

I Went to An Audio Store About 10 yrs. ago to look at any ones floor standing speakers (lot of them out there). About 50% of them sounded great to me ,The salesman asked if I had seen or heard any that I liked ,I said yes Ilike this cabnet,and this ones finish ,and I like this ones sound ect. Then I asked what he thought about DIY kits ? His resonse was that he never heard DIY speakers sound worth spit, he said it's not worth the time and effort,because they will never sound as good as the ones he sells...Long story short, Drivers ,Tweeters ,Leap crossover& cabnet plans from Madisound .My Dynaudio Twins SOUND LIKE BUTTER ,not spit

Can anyone tell me which of the speaker kits shops would be best at helping me create a new speaker design, like help design a crossover and the determine the cabinet volume. There is a speaker I recently discovered and liked very much, the bolzanos to be precise, and would like to build one similiar to it, but it is not a conventional design therefore I need professional help. Who would be best to help me?

Pedrillo Madisound does leap designs contact them be sure to have as much info about the design you want to copy. Best for them to know size of cab, port sizes etc, drivers used.