My version of 3D printable Stirling engine. You can see a bit of the process of assembly and operation of the engine here: https://www.youtube.com/watch?v=kttaajHHPeYCheck my I3 Mega ULTIMATE upgrade guide! There is a lot of knowledge which may help You get the best 3D printing results. You will find it here: http://bit.ly/2OVbu5ZTips:Make sure that Your printer is calibrated well before printing.Do not fix syringes too tight because glass will bend a little and it will create a lot of friction inside.Pistons must be polished with fine sandpaper to move freely inside cylinders, but without losing too much pressure.Angle between the cranks must be 90 degrees.Part list:12 x M8 Nut12 x M3x10 Screw18 x M3 Nut2 x M3 self-locking nut8 x M3x14 Screw4 x M3 Washer6 x M4 Washer4 x M4 Nut1 x M4 at least 44mm long screw with countersunk head. You need to cut it to right lenght.2 x 604ZZ bearing: http://bit.ly/2JMp75J4 x 683ZZ bearing: http://bit.ly/2qwAiHr2 x 10 ml glass syringe: http://bit.ly/2p2ebJlHeat resistant tubing to connect the syringes.Heat insulating material.Thin copper wire.(These are affiliate links.)Printing part list:2 x connecting_rod2 x flywheel_support2 x piston_mount_part_1.stl2 x piston_mount_part_2.stlEvery other part needs to be printed once.Print SettingsPrinter:ANET A6Supports:YesResolution:0.2 mmInfill:30% or moreNotes:I have printed it with PLA but the base was not stiff enough. STL files have been fixed a bit to help with that, but printing the base with ABS may be a good idea.