<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div><blockquote type="cite" class=""><div class=""><p dir="ltr" class="">A smart browser could just update affected vertex positions in the existing mesh.</p><p dir="ltr" class="">Andreas<br class=""></p></div></blockquote></div><br class=""><div class="">Thank you Andreas. And let’s not leave it up to the poor designer to write a script to do the job, as easy as it may be with cylinder extrusions.</div><div class=""><br class=""></div><div class="">John</div></body></html>