For the bracket I use PETG at the moment I am using fillamentatums modified PETG (CPE). It may work with PLA. I use 0.4 nozzle with 3 perimeters and 3 layers top and bottom and 50% infill. The handle adapter is printed on the side. The support bracket, I print with the axes parallel to the plate, ie not on it's side. Both parts have supports. 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.