Posted for randy snarr <randylsnarr@yahoo.com>:

 My 2 cents worth..
 My 5 favorite things about a solution are:
 
 Cheap
 Simple
 effective
 light
 cheap
 
 I have 2 washing machine water level sensors in the airplane. (see attached
pics) These little gizmos cost very little. I think you can buy them for $50
or so from your local appliance dealer. Lance also has a pressure switch that
looks very similar and as I understand it works well too. Mine were given to
me by by neighbor as he is in the appliance business. These sense the level of
water in the washing machine drum and they are very sensitive and rarely fail.
The ones I used are round about 2.5 -3 " in diameter and weigh 3 or 4 oz each.
They have 3 fast on connectors and are made to close a circuit when the
pressure reaches a set amount. They came in an ugly steel bracket that looked
like it was for a washing machine. I removed the sensitive round plunger piece
and made nice aluminum mount with a set screw to adjust the pressure at which
it closes easily accessable under the panel. It has a small fitting for an 1/8
tube you can connect to the pitot
 system. I tee'd two of these little pressure sensors between the pitot tube
and and the AS indicator. One is my squat switch. That one closes the circuit
running from the up side of the gear switch to the up pump relay and is set to
close at 80 Kts. The other is set to close at 100 kts and is used for a gear
up warning. It is connected to a small contact switch on one of my main gear
doors. If I slow below 100 kts and the gear is up, I get a red warning light
in front of my nose. I could easily add a horn...
 
 This solution has worked flawlessly . I also get a kick out of telling people
that I have washing machine parts in my airplane. The worst thing that would
happen if these fail is you could not raise the gear or the gear down warning
would not function. Both are checked regularly.
 
 My motto: keep it simple stupid...or maybe stupid simple.. I forget how it
goes..
 
 2 things I would add to this are the GUMPS landing checklist, gear,
undercarriage, mixture, propeller, seatbelts. You can get by in almost any
airplane with this...
 And 2nd is to always use the gear to slow down in the pattern. I religously
follow these even when I fly my Cessna 150.
 All the above combined have worked well for me...
FWIW
 Knock on wood...
 Randy L. Snarr
 N694RS
 235/320
 

[I'm with you... although my FI taught it to me as GUMPFS -- Gas, Undercarriage, Mixture, Prop, Flaps, Seatbelts.   He taught me to do a GUMPFS check 3 different times, downwind, base, & final.  Anytime I forgot it he whacked me in the back of the head with a sectional, and it didn't matter what I was flying.   It's a habit now, thank heavens.  I got tired of getting whacked early on <gg>.  <Marv>   ]