This is the standout pick from today's batch — most of the other candidates are Shorts, hashtag spam, or generic "TIG tips" clips with thin descriptions. AlfMart's combustion chamber build is the rare video that combines real fabrication, genuine engineering constraints, and a head-to-head process comparison.

The combustion chamber is arguably the hardest part of any RC turbine to fabricate. It's typically rolled from thin-gauge stainless (often 0.3–0.5 mm), pierced with hundreds of precisely-sized air holes for primary, secondary, and dilution flow, and then has to survive sustained operation at temperatures that anneal and warp lesser welds. Joining material that thin without blowing through, burning the edges, or warping the cylinder is a real test of heat control.

That's what makes the cold TIG vs spot welding comparison genuinely useful. Cold TIG (sometimes called pulse or micro-TIG) delivers extremely short, low-energy pulses that let you tack and seam thin sheet without distortion — but it's slow and demands steady hands. Resistance spot welding is faster and dumps heat locally between the electrodes, but joint geometry and access become limiting. Watching one builder run both processes on the same part, on the same material, is the kind of side-by-side that's hard to find outside of a working shop.