nah i was intimidated alil but it wasnt bad i used ge 1 silicone 1 tube did my 36" 58 gallon. the hardest part was getting all the old silicone cut and scraped out clean
a good sharp razor blade and be careful and use acetone to prep everything and remove any left over silicone residue. and us epainters tape in the corners to make it look nice and uniform.
ive heard of people breaking them , and shaving the top of the frame off with a razor blade and cutting the edges and then using monofiliment to cut through the silicone