A good starting point is 8 to 10-pound braid with a 6 to 8-pound fluorocarbon leader
For the photo, I've put the spool shaft back together so that you can see the bellevilles (key #5), the pusher bushing (key #6), the left spool bearing (key #7), the spool tube or bearing sleeve (key #8), the right spool bearing (key #14), two spool washers (key #16) with a spool spring (key #15) in between, and the brake bearing (key #17)
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Japanese Hamai Cut Hardened Brass Drive Gear 40 lb Carbon Bull Drag System Dead Stop Anti-reverse 7BB (2 High Spin Corrosion Resistant BB, 4 Stainless BB, 1 Dead Stop Anti-reverse) Arrowhead Line Guide Reinforced Clutch Cam Alert Drag KeepR Integrated Hook Keeper Generation II Hard Anodized Work Shaft Low-Friction 6-Way Braking System Beetle Wing Rapid Access Side Plate California Warning
Pitching senkos and drop shots under docks or on beds are both prime examples where this reel shines