Web application for a custom telescope workshop

We are developing a full-featured web application for a workshop that grinds mirrors and builds telescopes to order. The core of the site is an order configurator: a visitor selects an optical scheme (truss tube Dobsonian, solid tube Dobsonian or apochromatic refractor), specifies aperture and relative aperture, then selects a focuser, secondary mirror size, finder and mount class. Each choice recalculates price, tube weight and estimated queue date according to the workshop calendar. Mirror grinding is a separate service: the client specifies blank diameter and target focal length, tracks work through stages (rough and fine grinding, polishing, parabolization, Foucault and interferometer testing) and receives a photo report with tests and Strehl number assessment upon delivery. The eyepiece and accessory shop contains eyepieces by field of view and focal length, Barlow lenses, filters, coatings and collimation tools, with stock levels, cart and checkout. An intake form for collimation and repair allows describing the fault, attaching photos and booking bench time; the workshop sends an estimate before work begins. The lessons module sells spots for mirror-grinding and astrophotography master classes with seat limits and a waiting list, and the events module publishes star party dates with weather forecast, registration and dark sky map. The admin section manages the build queue, materials inventory, order and work statuses, student lists and event registrations. Includes: responsive frontend, backend on dotnet or Node of your choice, product and work database, payment integration, transactional emails and documentation. Everything is tested on real order scenarios before delivery.