Top, a reproduction midi-pump made by former CCS contributor Henrik and just below it is a repro cap I bought recently (and surprisingly cheaply at $17 plus $8.50 postage to UK) from a Japanese supplier. Below them, the Optimus products. Optimus top, repro bottom. Slotted SRV tensioner screw on the repro cap, penta screw on the Optimus one. Knurling variation, repro cap on the left. Function of repro pump and cap is just as effective as the original items. John
