<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Sean, the port had a dial gauge in the center. Each cycle showed deflection, but it increased over time(cycles)<div>Hank<br id="lineBreakAtBeginningOfSignature"><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Mar 17, 2024, at 1:26 PM, Alan James via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">Hi Jeff, welcome along. Keep the questions coming and if you dont get a satisfactory reply try again. This is a helpful and experienced group. <div>I have never heard of any home builder casting their own acrylic domes or view ports. It could be happening with the improvements in technology and products available.</div><div>You would need to build an inner & outer mold & let it set very slowly for the thickness involved. </div><div>When they pioneered acrylic dome casting they had a sprue at the apex of the dome for sucking material from during its shinkage while setting. And a lot of failures.</div><div>It also involves post molding machining & clean up. Also you will need a large enough computer controlled oven to ramp up & down the temperature at around 1 degree per hour.</div><div>Most people that attempt a home made dome will have it blown. But again you need to control the temperature increase.</div><div>Regards Alan.<br> <br><div id="ymail_android_signature"><a id="ymail_android_signature_link" href="https://mail.onelink.me/107872968?pid=NativePlacement&c=Global_Acquisition_YMktg_315_EmailSignatureGrowth_YahooMail:Search,Organize,Conquer&af_sub1=Acquisition&af_sub2=Global_YMktg&af_sub3=&af_sub4=100000945&af_sub5=OrganizeConquer__Static_">Yahoo Mail: Search, organise, conquer</a></div> <br> <blockquote style="margin: 0 0 20px 0;"> <div style="font-family:Roboto, sans-serif; color:#6D00F6;"> <div>On Mon, 18 Mar 2024 at 6:25 am, Jefferson Tortorelli via Personal_Submersibles</div><div><personal_submersibles@psubs.org> wrote:</div> </div> <div style="padding: 10px 0 0 20px; margin: 10px 0 0 0; border-left: 1px solid #6D00F6;"> _______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"> </div> </blockquote></div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span>Personal_Submersibles@psubs.org</span><br><span>http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</span><br></div></blockquote></div></body></html>