Ender 2 Z-Axis Endstop

This part is lager as from 2bedom. My printing plate is 4mm higher as the original and mad with 3 mm glass plate and 1 mm FR4 GFK plate like this: https://www.amazon.de/GFK-FR4-Tafelformat-Glashartgewebe-wei%C3%9F/dp/B008058CZC/ref=sr_1_3?ie=UTF8&qid=1520158349&sr=8-3&keywords=FR4+GFK+1mm
To glue all the parts i used "3M 467MP" duct tape like this: https://www.ebay.de/p/1-rolle-3M-467MP-Klebstoff-film-Doppelseitiges-Klebeband-Tape-breite-w%C3%A4hlbar/1106355763?_trksid=p2047675.m4097.l9055