This datapack (or mod, packaged by Modrinth) will let you use Create to make Spurs from Numismatic Overhaul coins. You can also craft Spurs/Cogs into coins, however, this is at a loss. I didn't spend any time figuring out if this was balanced or if any recipes looped into each other but it works for my server, so enjoy!

Coins to Spurs

With this enabled you can use Create Compacting to form coins into spurs. All recipies require some amount of lava, a mechanic press into a basin (compacting), and are as follows:

Spur

16 Copper Coins + 16 Copper Nuggets = 1 Spur

Bevel

4 Spurs + 4 Silver Coins = 1 Bevel

Sprocket

1 Bevel + 4 Silver Coins = 1 Sprocket

Cog

1 Sprocket + 1 Gold Coin = 1 Cog

Crown

2 Cogs + 2 Gold Coins = 1 Crown

Sun

2 Crowns + 2 Gold Coins + 1 Netherite Ingot = 1 Sun

Spurs to Coins

Coins can be mixed from Spurs using heat, water, and some nuggets. Recipes are as follows:

Spur to Bronze

1 Spur + 9 Copper Nuggets = 16 Bronze Coins
This is the only recipe thats technically not at a loss. It can also take any copper nuggets taged with c:copper_nuggets, so nuggets from mods like Hephaestus will also work.

Bevel to Silver

1 Bevel + 9 Iron Nuggets = 4 Silver Coins

Sprocket to Silver

1 Sprocket + 9 Iron Nuggets = 4 Silver

Cog to Gold

1 Cog + 9 Gold Nuggets = 1 Gold Coin

Crown to Gold

1 Crown + 9 Gold Nuggets = 3 Gold Coins

Sun to Gold

1 Sun + 18 Gold Nuggets = 8 Gold Coins (this also needs to be super heated)