All I'd say is take your time when marking where the holes should be, and when it comes to drilling, don't rush it.
I started out with a small pilot hole, then just kept using a bigger drill bit until the hole was the right size (6.5mm I think it was). I also used a counter-sink to remove any rough edges.
Also the knobs were quite hard to get off, try not to break the unit whilst pulling them off
I started out with a small pilot hole, then just kept using a bigger drill bit until the hole was the right size (6.5mm I think it was). I also used a counter-sink to remove any rough edges.
Also the knobs were quite hard to get off, try not to break the unit whilst pulling them off