The only thing required to be on the data plate are: (per CFR 45.11 and 45.13)
1 - Builders name (must match the name on the A/W cert and registration)
2 - Model designation (whatever you have named your airplane-again must match A/W and registration).
      Such as:  Lancair ES, ES, Super ES, or LNCE.  Could also be a totally different name from a Lancair.  You are the builder, so you get to name it.
3 - Builders S/N (doesn't have to be the S/N of the kit, but rather whatever S/N you designate since you are the builder and again must match the A/W and registration)

It must be etched or engraved so it can still be legible after a fire.  You can use most any adhesive as long as the two surfaces are prepared correctly.
I know of at least two instances of an FAA inspection where the inspector didn't approve the plate being glued on.  (said it could melt and the data plate could fall off)
In both of those cases, two rivet heads were cut off and glued to the stainless plate so it appeared it was rivited on.
I think most DAR's don't care how it's attached as long as it's in the proper place near the tail. (under the horizontal stab is perfect)

Ron



 
I’ve been through this recently with my airplane and have learned the following:
 
1.The placard has to be fireproof and “permanent”.  No aluminum or plastic.  Should be made of steel.
2.The line items and way of expressing them on the placard are specific – I don’t recall all of them, but many placards are not completely correct.  Your DAR may require you to  change it if the data is not exactly accurate. 
3. Tape is not legally acceptable and you may lose the thing in flight if you try it.  I suggest using Hysol adhesive.  Sand the fuselage and the back of the placard with 80 to 150 grit, clean with acetone and bond into place with a thin layer of adhesive.  Make sure it’s completely wetted out and you need to have it under pressure against the fuselage during the initial set time.