There are no upgrades to improve the single-action Valentine - there are stainless pillars to replace the anodized alloy pillars.
Salt exposure can "weld" the anodized pillars and stainless screws with corrosion (making vise-grips on the pillars the only way to separate them).

The upgrades are for the planetary multiplier - replacing the splined-round knob with a rectangle-section smooth knob, and anodized aluminum gears replaced with Delrin.

Notably, 8/9 is not the line rating, but the reel diameter in mm - 89 mm = 3.5 inches.

Barry, the drag is really simple - metal washers and the Delrin ratchet plate - doesn't keep it from working Great at extremes and everywhere in between.

The ratchet is also part of the drag surface, and is one-sided - if you need to change wind direction, need the opposite ratchet plate from Valentine.
If you don't need it, might take it apart and clean it to see for yourself - the drag is made to run dry - no grease or oil.

Sorry I don't have the parts diagram, gave it away with the reel above, which I sold - too many good reels in the niche.

you're welcome - enjoy your great reel.

Nothing - it's perfect as is....

Tom

Yes - confirm the drag knob upgrade. Personally find the original better looking and there isn't much difference in functionality.

Barry, Valentine bros are first an aerospace fab shop.
I've always called, and the receptionist is on top of the fly reel parts.