The hanger is finally fixed. The tubes will be installed later, just before the wings are installed.
Other than the instructions in the manual I fixed the hanger with AN3-5A bolts instead of RV-1613 rivets. This has the advantage to be able to dismount, but the main reason is shear load on the hanger. Some builders experienced sheared rivets (due to movement of the ailerons). The bolts will withstand this load.