In LATE response to your question the myrtle covers half a biscuit. I got a table manufacturer to join the two pieces of huon pine with a jointer and he insisted upon have two biscuits in the join. I told him to put them 100 mm apart in the centre so they would not intrude upon the tail or the neck pocket of the guitar. Well the biscuits were not in the centre but 100 mm from each end and i managed to cut right through it with the router (couldn't really be helped). So i figured to fix it I'd get 3 bits of Tiger Myrtle- 1. Neck patch, 2. Pick guard, 3. Input Jack Cover
The Electric i have made is turning into a Frankenstein of fixes and Lessons learned...
Lesson 1: Always lock your plunge on the router...
Lesson 2: (A REAL NO BRAINER) Don't Drill Input Jack Holes in the side before trying to round the edges...le sigh...Any suggestions for a FIX?
Lesson 3: Really Don't need such a Large Control Cavity

LESSON 1-Went too deep on the plunge and had to make a choc/wedge of maple then glue, clamp and re rout.

LESSON 2- seemed like the bevel wanted to go 'home' in the hole (Happy Gilmore Style)

LESSON 3- Control Cavity itself is rather large