I have an older -40dF that I just dont use anymore. Too warm.

I was thinking about removing maybe 8 or 14 oz of down from it and maybe build something else with that.

It has v baffles so it would probably be a nightmare.

The fill seam is on the inside opposite the zipper so that looks easy. Not sure about the V baffles though.

So if I removed 14-16 oz of down I am not sure what would happen to the loft considereing it has V baffles since it is not designed for less down and I dont want any thin spots.

The design loft is 6" top, 4" bottom.

Than again maybe I sould just try to sell it again. Its faded but still in good shape.

Do you know the honest fill capacity of the down in your bag? It may not be high enough to be worth the trouble.

The problem with V baffles is that you may not have enough room to reach in and get a fistfull of down.

I understand wanting to revive/modify a bag that is an old friend. I have an ancient Ski-Hut bag (as per Collin Fletcher) which probably had 650 cubic inch down when God was a little girl. I have thought about replacing the old down with good 800+ down, but the bag would still be on the heavy side because of the heavy-duty fabric. Consequently, it hangs in the closet while I make and use UL quilts.

The bag weighs 4# without the collar so I would guess 850+.
It was the very top of the line at the time.