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
!16 bronze coins and 16 copper nuggets to Ala Le Spur

Bevel

4 Spurs + 4 Silver Coins = 1 Bevel
!4 spurs, 4 silver coins to a Bevel

Sprocket

1 Bevel + 4 Silver Coins = 1 Sprocket
!one Bevel, 4 silver coins to a Sprocket

Cog

1 Sprocket + 1 Gold Coin = 1 Cog
!one Sprocket and a gold coin to a Cog

Crown

2 Cogs + 2 Gold Coins = 1 Crown
!two Cogs, 2 gold coins to a Crown

Sun

2 Crowns + 2 Gold Coins + 1 Netherite Ingot = 1 Sun
!Full lava, 2 Crowns, 2 gold coins, 1 netherite ingot into a 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.
!spurt

Bevel to Silver

1 Bevel + 9 Iron Nuggets = 4 Silver Coins
!1 bevel 9 iron nuggets to 4 silver

Sprocket to Silver

1 Sprocket + 9 Iron Nuggets = 4 Silver
!sprocket iron nuggets silver coin urggg i have to type these all outttt

Cog to Gold

1 Cog + 9 Gold Nuggets = 1 Gold Coin
!ONE WHOLE COG 9 GOLD NUGGETS TURNS INTO ONE WHOLE GOLD COIN

Crown to Gold

1 Crown + 9 Gold Nuggets = 3 Gold Coins
!we got the crown in the water pot with some gold nuggets turning into 3 whole gold coins

Sun to Gold

1 Sun + 18 Gold Nuggets = 8 Gold Coins (this also needs to be super heated)
!THE SUN CONSUMES ITSELF 18 GOLD NUGGETS AND A TASTY BLAZE CAKE BURNS IT INTO 8 GOLD COINS