Techniques in transfixing nasofrontal augmentation grafts.

My dear colleague... your self-indication is not very good idea; I don't see the poing of using cartilage from different sources on radix-bone versus middle vault; may you suffer saddle nose deformity and a sunken dorsum the plan should be:
-onlay en bloc full lenght 1, 2 or custom layers from radix to supratip
-if you have thin skin (very common) adding a temporal fascia graft to cover the graft and prevent its visibilityFixation happens by scar formation within 2-3 weeks; initial stabilization is accomplished intraoperatively by suturing the lower end of the dorsal onlay graft to the supratip and middle vault, and the upper end is secured either by direct fixation (short ones) or (likely in your case) with a temporary transfixing suture through the skin of the radix.
If you wish better grounded opinion please do post or send privately well lit, focused and standard images: frontal, both lateral and both oblique views, also underneath the nostrils.
Feel free to request any additional information from me.