<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div><span></span></div><div></div><div id="yui_3_16_0_1_1432137705594_2547" dir="ltr">Jon, when you take the MK 101 apart you will see why no one has drilled the apex cap. The cap is an aluminum casting that has a support boss right at the apex that holds the roller bearing and bushing for the motor axle. As I elected not to drill the housing I can't comment on preferred location. The body of the housing has the permanent magnets but there is room between the magnets for a port. You would have to position the port so it does not interfere with the long bolts that hold all the parts together. The assembly comes apart very easily. Just keep track of were everything goes.</div><div id="yui_3_16_0_1_1432137705594_2688" dir="ltr"><br></div><div id="yui_3_16_0_1_1432137705594_2689" dir="ltr">Regards</div><div id="yui_3_16_0_1_1432137705594_2690" dir="ltr"><br></div><div id="yui_3_16_0_1_1432137705594_2691" dir="ltr">Cliff</div><div id="yui_3_16_0_1_1432137705594_2549"><br><br><br><br><div id="yui_3_16_0_1_1432137705594_2692"><br>Cliff Redus<br>Redus Engineering<br>USA mobile: 830-931-1280<br>cliffordredus@sbcglobal.com </div></div><br> <div id="yui_3_16_0_1_1432137705594_2713" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div id="yui_3_16_0_1_1432137705594_2712" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_1_1432137705594_2711" dir="ltr"> <hr size="1"> <font id="yui_3_16_0_1_1432137705594_2710" face="Arial" size="2"> <b><span style="font-weight: bold;">From:</span></b> Jon Wallace via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, May 20, 2015 10:52 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] MK101 oil compensation tap<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1432137705594_2714"><br><br>At first glance the MK-101 shell looks pretty thin. I know they've been <br>drilled and tapped to accomplish oil compensation but before I start I <br>just want to know of any tips/tricks I should be aware of. Also, any <br>reason nobody has drilled and tapped at the apex of the head on the end <br>opposite the propeller? Most every one has drilled in the cylinder body.<br><br>Jon<br><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" ymailto="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></body></html>