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I think it’s the lack of expansion as you press the figments in. They are a push fit and theCA is brittle . If you’re even slightly out pushing the tube will flex but the CA will not , hence end cracking.

A reamer and secure the fittings with a drop of CA perhaps but tubes MUST be scrupulously clean internal DAMHIKT 🫣

Im still learning with CA and like Phil much prefer melamine lacquer.

I apply 50% thinned first and leave overnight to penetrate and cure .
You do ( or rather I found I do ) need very good quality brushes to flow it on though. There is little as frustrating as the” set stray hair “ in the surface when you come back to assemble one

<blockquote data-quote="howsitwork?" data-source="post: 361161" data-attributes="member: 2121">I think it’s the lack of expansion as you press the figments in. They are a push fit and theCA&nbsp; is brittle . If you’re even slightly out pushing the tube will flex but the CA will not , hence end cracking.A reamer and secure the fittings with a drop of CA perhaps but tubes MUST be scrupulously clean internal DAMHIKT 🫣Im still learning with CA and like Phil much prefer melamine lacquer.I apply 50% thinned first and leave overnight to penetrate and cure . You do ( or rather I found I do&nbsp; ) need very good quality brushes to flow it on though. There is little as frustrating as the” set stray hair “ in the surface when you come back to assemble one <img class="smilie smilie--emoji" loading="lazy" alt="🤬" title="Face with symbols on mouth&nbsp; &nbsp; :face_with_symbols_over_mouth:" src="https://cdn.jsdelivr.net/joypixels/assets/6.6/png/unicode/64/1f92c.png" data-shortname=":face_with_symbols_over_mouth:" /></blockquote>

[QUOTE="howsitwork?, post: 361161, member: 2121"] I think it’s the lack of expansion as you press the figments in. They are a push fit and theCA is brittle . If you’re even slightly out pushing the tube will flex but the CA will not , hence end cracking. A reamer and secure the fittings with a drop of CA perhaps but tubes MUST be scrupulously clean internal DAMHIKT 🫣 Im still learning with CA and like Phil much prefer melamine lacquer. I apply 50% thinned first and leave overnight to penetrate and cure . You do ( or rather I found I do ) need very good quality brushes to flow it on though. There is little as frustrating as the” set stray hair “ in the surface when you come back to assemble one 🤬 [/QUOTE]

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