I've put a few videos on my you tube channel inserting the insert to the Ex Lite,
Using Lanacane and Cling film, with the correct approach and lubrication you will find the insert goes in smooth and easily removed. Videos for the Classic insert and New Insert.
Best Regards
Paul
https://youtu.be/bweo3aA489A
https://youtu.be/8YQgGwRBhaI