Mercedes Sprinter Van water leak repair rooftop Air Conditioning

Torx T27 inside the van. Torx T30 upper rooftop cowl. Torx T25 lower rooftop cowl. Cross member has 4- 13mm bolts, and requires a T30 and a 10mm socket to remove condenser support bolt. I replaced the T30 bolts which were 6.0 mm x 1.0 pitch and were 12mm long with stainless steel bolts that were 16 mm long and had a 10 mm head. I also added a stainless steel, larger fender washer.... I used GE silicone 100% 2+, in a standard tube. Recommend smaller tube for getting it into the tight bits.