You will - or at least one or two. Some people wet the allen wrench in oil and dip it in sand to increase grip - might work? I'd suggest doing it before 36 months. It'll tell you whats going on in your new engine not to mention flushing all the manufacturing left-overs out. If you see small finger nail size steel clippings on the drain magnet or in the screen dont freak, they are simply the edges of your straight cut gear teeth and will deminish during subsequent oil changes.
If the sand method fails here's what I did, it was for an '07 deep sump S4R but the 848's sump is similar.
Once you do it, its real easy later. Follow these steps, worked like a charm.
1. Go to the harware store and pick up 4 stainless metric button head screws of the appropriate length, diamenter and pitch. Be sure to get button heads. There ia a reason the screw are so soft, so thay scrape off incase you hit something like a speed bump. Cap or hex head could rip up your case, not to mention dump a big pile of oil.
2. Get a 1/4" or so tap with a sharp tip or point, to use as a center punch or buy a small punch. I used a tap becausse it hardened, sharp and I had one. Also get a small hammer.
3. Position the tap on the outer edge at the top of the screw at an angle and tap it counterclock wise. Remember your looking at it upside down. The tap or punch ought to dig into the screw enough to get a grip or catch it. Dont pound too hard, a bunch of small taps it better than one big one. Keep an eye on the head of the screw and it ought move a little at a time until it eventually loosen. Search other forums some people drill it out with a right angle drill motor.
4. After you get all the screws out the cover will come off leaving the screen.
5. Using a narrow pair of needle nose pliers (two preferably) reach up and grip the edge of the scrreen. Be careful, its plastic, thin and brittle. rock it back and fourth first while pulling until it loosens a little, then twist and pull (gently). Eventually it will come straight out.
6. Also remove the drain plug and clean its magnetic trap.
7. Clean and put everything back together using the new screws.