Any tips on seaming 75 oz and up carpets? I'm having trouble with the long carpet fibers getting in between seam edges and sticking to my hot glue tape.

Use basic clear packaging tape. After you cut the carpet pieces, place this tape against the edge just above the substrate where the tufting starts to capture the fibers.Then gently bend the fibers back on top of the carpet and press in place. This will keep them back while you work with the sealer. After you butt the substrate together, remove the packaging tape and proceed with the hot iron step. The residue from the packaging tape should be very minimal. If the nap is very long, place an old pillow case (or similar) over the seam to prevent burning. Ask the carpet dealer about the hold time for the carpet to seam.