Hi Lipolad,
I built mine with drilling a hole and bolting it on however I added a second bolt since I did the same with my skymaster phantom tail as well (two bolts instead of one). With two bolts however, I noticed slight rocking of the fins since there is mold mismatch on mating surfaces. Then I placed some cardboard in between and tightened and trimmed off excess cardboard. Its pretty tight right now. However when I asked LiKai he mentioned they also recommend bonding... your choice either way should work.

jason