Cliff Rogers, one of my Sihings who also does competitive powerlifting, recently posted a video on his Youtube channel that’s of interest to Wing Chun people. He discusses using a “Swiss bar” (a barbell with many handgrips for doing exercises at various widths) to develop speed in the Chain Punch.
NOTE: I asked him what the bands are attached to – he said there are pegs on the floor at that station but that you could use dumbbells to anchor the bands. He added that the bands are cheap. I found some Workout Bands on Amazon for $12 that have a resistance of 50-75 pounds. I could do this with a bar and not too much extra weight (Cliff does 500+ but I only do a 185 Bench at the moment!).
Check it out.