Remixed from a model by @FairLight scaled up toi 200%, I assembled the two halves of the piston and printed as 5 parts on three plates. The silver PLA is eSun silk and it look great but needs a lightly higher temp on my A1 Mini and really likes having a brim to help withe the first layer.

There are a lot filament changes in this, but the result was worth it.

(This is my first “serious” make, form my Grandson Jake, text not included in model, add your own)