Custom dust extraction blast gate with hose spigots

Does your extraction hose miss standard blast-gate sizes? This model connects two matching spigots through a manual sliding blade. The housing halves bolt together. The solid blade pulls out to open; it has no circular through-hole. What you can customise: Match spigots to the measured hose. Two identical housing halves simplify printing. Removable blade for cleaning. How to measure: 1. Measure the actual hose bore and choose the finished spigot diameter with fitting allowance. 2. Allow for the extended blade; opening needs additional sideways travel. 3. Check wall thickness and clear bore; export all three pieces with matching parameters. Assembly and trial fitting: 1. Print two housings and one blade. Deburr sliding surfaces and remove all supports. 2. Put the blade between the facing grooves; fit four bolts, washers and nuts. Default holes suit M4; choose length for the assembled stack. 3. Secure and independently support hoses. Test motion and leakage at the intended suction. 3D printing notes: Housings are supplied spigot-down. The overhanging flange needs external supports; inspect the sliced print. Print the blade flat. Start with PETG, 0.2 mm layers and sufficient walls. Tune sliding clearance on a trial piece. Fit and included geometry: Prototype for suitable hobby extraction; no airtightness or airflow rating. Not a pressure valve or an ATEX/antistatic component; not validated for hazardous dust, hot chips or sparks. Blade can be fully withdrawn and is not captive.