Tacks, with a rounded head, are best suited for securing heads and playing ease. A width gauge, such as one used for wire, can give you an accurate reading of the actual depth of you drum's walls. The pin length for shell penetration should be checked for adequate depth but not to pierce the inner wall of your drum. A shallow pin depth may also cause pulling due to the duress the head may endure. If you must use flat head tacks check each one to see that none of them has any upward flair which may cause discomfort or injury in performance.
Hose clamps come in sizes from small to large, or long.
Just as one would tighten lugs on a conga, or snare drum, equal distribution of torque will insure balance of pressure. The clamps must not be overtightened either. This may seem obvious but the torque on the clamp screw can be deceiving. When preparing to use hose clamps form a ring with your clamps and place it over the lip of your drum to see how much clearance area you have. This will allow you to place the head on the bowl and have enough room to lower the clamp over it and tighten it securely.