I will 3d print, inspect and ship your functional prototype

One part within 100 x 100 x 100 mm, up to 8 print hours and 100 g of material including supports, 1.5 h of engineering time (review, setup, inspection, check sheet), 5 measured dimensions, and one parcel up to 16 x 16 x 16 cm and 1 kg. No CAD editing. All limits apply together.

Up to 2 parts, each within 150 x 150 x 100 mm, up to 20 print hours and 300 g in total, 4.5 h of engineering time including up to 1.5 h of CAD changes, 10 measured dimensions, a fit check between the printed parts, and one parcel up to 25 x 20 x 20 cm and 2 kg. All limits apply together.

Up to 4 parts, each no longer than 180 mm, up to 40 print hours and 700 g for the first print, 9.5 h of engineering time including up to 3 h of CAD changes and the reprint round, 20 measured dimensions, fit and movement checks, and one parcel up to 30 x 25 x 20 cm and 3 kg. All apply together.

A finished model: STEP preferred, STL or 3MF accepted. Basic prints your model as supplied and lists any issues I find; it includes no CAD editing and no edited files. Standard and Premium include CAD changes within their time limit, and you receive the edited STEP

I measure the agreed dimensions, within your package limit, against nominal. Standard and Premium add a fit check between the printed parts supplied; Premium adds a hand check that a printed hinge, slide or snap moves. I can't check fit with hardware I don't have, and don't test strength or safet

Revisions are changes before printing, approved in writing (Basic: print setup only). Premium's round reprints up to 2 parts that fail agreed checks for design reasons: 1.5 h CAD, 15 print h, 250 g. Fixing my own print-quality errors is free and uses neither revisions nor that round.

I don't promise a fixed tolerance before seeing the part, because it depends on size, geometry, material and orientation. I flag risky features before printing and report the measured values of the agreed dimensions, so you can judge the result.

I only offer materials I can print reliably, and I confirm which suit your part before you order. FDM parts are weaker across their layers than moulded or machined parts, so tell me how the part will be used.

Courier transit and customs times depend on your destination, so I give you the courier's estimate for your country before you order. Import duties and taxes are paid by you on arrival.

You own your design. I don't reuse, sell or publish your files or parts, and I can sign your NDA through Fiverr before you share files. I only photograph your parts for my portfolio with your written permission.