when you look at ebay they can mislead by saying "for bosch" or "genuine for"
so check full description with a magnifying glass
and dont forget they have there own very similar CE mark that means Chinese exports
iff you think off it a 12.5 or 12.7mm[half inch] drill bit might seem sloppy but your shelf will do no more than sit on the top off the rods
even iff you lever on the front edge the most you will get is the back taking up the slack, so perhaps 0.5mm different and you won't see that
in your drawing there seems to be red dotted lines suggesting one level outside another
now my thoughts are you wont tend to go bigger as you go up as the narrower below is the pinch point so greater above is pointless so moving to a narrower position above would seem correct but fully a guess ??
we need to put some context here
holes in wood are give or take 1mm in general around the shaft always with clearance as wood moves 'expand and contracts drilling for the thread should be around 0.5mm less than screw size
in general the countersunk head is the only real point off gteed contact...
ghost trains are to do with the procedure for closing a line or station you have to make a case and show what alternative ways people can complete the same journeys often requiring a permenant replacement service like a taxi on demand for the journey [look up newhaven marine station ] or a bus...
a bit strong really [unless your comments are rhetorical ]entering a vote must conform with requirements as in clear'and to requirements "spoiling " will mean non-compliant so off no interest or offence ??
would be an interesting conversation when the repair engineer says "it says in the manual not to be installed next to a heat source " as he thinks about packing his bag and walking away as he has a get out clause ??