1: draw a line with a ruler app. one millimeter from the "bottom" of that curve.
Maybe both pieces of wood are curved.
2: adjust your plane to absolutely minimum "response"(??? i'm from Denmark, and I dont know the exact word.... pardon)
3: start at the ends, taking precaution that you strok in the right direction. (to avoid chipping)
divide the distance from the middle of the curve to the ends into 5 to 10 pieces, starting at the ends. then......
a stroke at "sector 1" then sector 1&2 then 1-2-3- then 1-2-3-4 and so forth. always make sure that the plane dont tilt. (if you are skilled with a pencil and a ruler, you can draw the line on both sides of the blank to prevent overdoing the one side. you can also use an "angle" (???) 90degrees observe if light slips under. If that's the case you have to work the dark areas)
4: when you've reached the pencil line you are almost there. now you stroke with the plane over the full lenght. and this is where you must make sure that the tool is peak-fitness-conditionally sharpened. Keep your tounge straight in your mouth and concentrate.
the following is of utmost importance. this is what nobody else tell you when they say: go practice.
I : control your breath. dont "cloze your throat" if you do your heartbeat will cause your chest to Bump causing loss of controll over your arms.
(a little like: breathe in/breathe out Daniel-san) Now try to fill your loungs and hold your breath without "locking your breath". If you lock and pay attention you will feel your blood preassure rising, and that's no good. you dont need to use that much force anyhow.... this isn't weight-lifting...
II : remember BALLANCE Daniel san...... Keep your feet slightly angled and apart. you can feel it when you do it right.
III : use no down-force on the plane. You can't keep a constant vertical pressure while moving back and forth. The plane itself will do that for you.
IV : maintain the same cutting speed with each stroke. You may well stroke with different speeds from stroke to stroke, but everytime you stroke, you will have to maintain the same speed during the stroke.
V : this fifth advice is the most important. without it you will never achieve your goal, and you might as well consider giving it up.
BELIEVE IN YOURSELF !!! CONVINCE YOURSELF THAT YOU CAN DO IT !!! DO IT JUST LIKE IT WAS JUST ANOTHER DAY AT THE OFFICE !!! TELL YOURSELF THAT THIS IS A THING YOU DO JUST LIKE SHAKING YOUR PINK WILLIE AFTER A GOOD PISS!!! REALLY !!! IT'S NO BIG DEAL !!! ONLY OBSTUCTION LIES WITHIN YOUR BRAIN..... A LITTLE THING CALLED "AMYGDALA" (prevents you from jumping off a tall building because you just lost your wallet an want to be the first to pick it up from the sidewalk..... actually the main cause of our very existance as a species. If you think: this could go wrong you're almost ceartain that it will if you think: this is going to be a success, you are also almost certain that it will be. your mind is more powerfull than you think if you concentrate)
I hope this is of any use for you, and if you want to achieve something nice, believe that you can do it yourself and dont put your wood in the hand of an electric carpenter...... trust in yourself. when you craft something with machinery, the result can only be as good and precise as the machine. and a machine can never be as good and precise as your hands and mind. Fast maybe...., but never precise.....
by the way..... this guy www.morch-guitars.dk don't rush into anything, and he makes a living of it he finishes like one guitar/bass a month.