On the plug, what I have done is extend the harness (one wire at a time).
It seems that I've always extended the harness that came from the front of the
machine, but whatever end you can comfortably cut at least 6" from the female/
On the formica. When extending the one that was put in a Friends bar (O'Leary's),
I used white formica (of course it didn't exactly match), and then had a
decal made (pretty cool decal) that said O'Leary's Bowling with this
angry looking ball racing toward these scared looking 10 pins. That decal lasted a
long time before it showed wear. If I did it again, I would put mylar over
the extended section. Certainly you'd put Pacman11 or whatever. Not O'Leary's.
It makes it appear there's a reason why the formica on that section has
no lines, an actually add's a little something to the lane..
If you choose that route, I should be able to have that decal made for you..
When making the gutters, having a table saw blade (maybe the common 10")
that pretty closely fits the gutters circular indent placed in the table saw, and then
clamping a guide so that the board is sawing into the side of the blade
will give 90% of the indent the gutter needs. Then 10% is a little sanding.
I did the sanding with 60 grit wrapped around a 2.5" pipe coupling..
Start the saw blade very low, and slowing increase with each pass..
I've made an 8' extension for a 13' bowler, and a 5' for a 16 footer,
and 21' is fine, but honestly, length to width, I think maybe 20' is close
to the perfect ratio..