Canon underwater housing WP-DC34 (for Canon G11) and 67 mm lens adaptor from Dyron

Hello, someone have experience with the Canon underwater housing WP-DC34, for the Canon G11, with the 67 mm lens adaptor from Dyron and the wet lens 0,3x M67WA15 from Dyron?. Acording with the specifications this wet lens have one underwater angle of 120º. I´ts possible the adition and remove of the wet lens 0,3x M67WA15 from Dyron underwater with this underwater housing, WP-DC34?

Thanks for your information and experience

Pedro