Ok so has anyone out there actually replaced the Boxster Conv. Top themselves?  Very hard to do?  Some what difficult? Recommend dealer/ pro only?  My canvas material is great looks good & no leaks what so ever. Its just the OE plastic window, that looks like  

  . Got a quote from a local reputable upholstery shop, which has experience redoing Conv. tops of all sorts. They quoted 9hrs @ $70/hr to remove and replace with a new top.  Another shop said that they could remove the old plastic window and sew in a new one using the original top. But could not guarantee against any leaks etc. @  a cost of  $495.  I have thought of upgrading to the GAHH glass top, but for the cost of this upgrade I think I would want to the Remove and Install myself. Anybody have experience in this matter. 
01 BOX S in Artic Silver
-VICTORY3