<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div id="yui_3_16_0_ym19_1_1461845332912_2792"><span>Alan,</span></div><div id="yui_3_16_0_ym19_1_1461845332912_2792" dir="ltr"><span>I can't </span>recall if you have a shoulder on the end cap for the barrel to sit on. Since your caps are so beefy, machine a substantial shoulder for the barrel to sit on then clamp and weld. I am not in love with the big plug idea, probably would work but I have seen things like that go bad from getting stuck. I would just clamp it and weld it then machine it true again. </div><div id="yui_3_16_0_ym19_1_1461845332912_2792" dir="ltr">Hank</div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Thursday, April 28, 2016 4:36 AM, Alan via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container">Am re-phrasing a question I asked a little while back.<br> I am making my aluminium thruster housing in 3 sections, front & back with<br>a cylinder between them. I had wanted to weld the cylinder section to the front housing<br>but was advised I would get too much distortion. If I made a steel plug to fit inside<br>the cylinder & front section to stop it distorting during welding would this work?<br>It would be a big heat sink. I could press it out afterward if it became stuck in the<br>process. <br>Alan<br><br> <br><br>Sent from my iPad<br>_______________________________________________<br>Personal_Submersibles mailing list<br><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></div></body></html>