<div dir="ltr"><div>Hi Jon,</div><div><br>I drilled into the cap. Not right at the end, but a little further along the "top". </div><div> </div><div>At first I did it at the sides like Alec has his, with a tube connecting the two. However, the way I did it, I had problems. I used 90 degree elbows tapped in between the magnets like Cliff has just said. However, they poke through, just a tiny bit. This meant that it was really really difficult to get the last dregs of air out. It was always trapped behind this inside lip. Maybe if you had the elbow threads on the inside completely flush, you wouldn't have this problem. I cant comment on that as mine stick through a bit.</div><div> </div><div>So, after getting fed up with them, I drilled vent holes in the caps which are sealed with a bolt and rubber gasket. So, I can tip the motors and get all the air out. </div><div> </div><div>So, ive sort of got the "round the side" pipe like Alec has, along with this vent hole to get the last bit of air out. It works much better. </div><div> </div><div>I would think that you could probably just have a pipe on the rear part, but then if you have an elbow attached, you may get the same problem as I had to start with. </div><div> </div><div>I don't have any pictures of it, but I can take some tomorrow for you if you like.<br>Kind Regards</div><div>James </div></div><div class="gmail_extra"><br><div class="gmail_quote">On 20 May 2015 at 16:52, Jon Wallace via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
At first glance the MK-101 shell looks pretty thin. I know they've been drilled and tapped to accomplish oil compensation but before I start I just want to know of any tips/tricks I should be aware of. Also, any reason nobody has drilled and tapped at the apex of the head on the end opposite the propeller? Most every one has drilled in the cylinder body.<br>
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Jon<br>
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