For the bracket I use PETG at the moment I am using fillamentatums modified PETG (CPE). I use 0.4 nozzle with 3 perimeters and 3 layers top and bottom and 50% infill. Both parts have a little support. The seal adapters are printed in TPU with 3 perimeters, 3 top and bottom layers and 50% infill. When installing only tighten the bolts sufficiently to secure the assembly, it is useful to recheck the security after some time and tighten the bolts further if necessary.