Thanks for sharing your experience.
But will the filter still crack if it is placed at the objective end?
I can understand these eyepiece filters crack when used at the eyepiece end, as per link below:
https://www.youtube.com/watch?v=G5xb3b-vRd4
But find it hard to contemplate these filters cracking when placed in front of the objective lens just like other solar filters, eg, glass or film solar filters? They will not heat up and expand and should not crack when placed in front of the objective lens.
Clear skies,
Bill