A very simple Piston with a Conrod made by me who is new to SolidWorks :)

Only use support for the cuts where the piston rings should be the connecting piece is a press fit and i reccomend to lubricate the connecting piece (wrist pin) before hammering it in place. The Connectingpiece should be printed while laying down and with supports same for the conrod. Keep in mind that your printer should be working well to achieve the tolernces needed