I've made a major remix of the FlyAway Solutions' Boeing 737 throttle. The reverse thrust lever was redesigned to drive the reverse blocker mechanism that physically limits the throttle's retard movement. When the reverse thrust lever is lifted upwards, the blocking is removed and the throttle can be retarded to the lowest position of the Saitek's throttle quadrant, enabling the reverse thrust trigger in the simulator (the thrust reverse trigger must be set to the event when the throttle's lever is retarded all the way back).
I am including the main handle's model without the engine numbers and 2 handle models with the engine number placeholders. The engine number models are also included and once printed (in a different color of course), they must be carefully pushed into the corresponding placeholders in the handles. Some minor adjustments may be necessary for the proper fit.
I am also including the model of the throttle's body and the cover with their holes covered by a 0.2mm thick polygon. This is done to avoid problems when printing the parts. On my printer the small holes on the initial layer are not printed well and often printing the parts ended up in a messy blob of plastic that was dragged around. After printing the parts you just need to punch through the thin layer to open the holes.
The hole for the Saitek throttle quadrant's lever was made a bit larger on purpose. If the throttle doesn't sit tight on the lever, put a piece of electric insulation tape around the very top and around the middle part of the quadrant's lever to compensate for the gap. This allows a semi-flexible, but tight connection between the throttle and the lever.
NOTE: Please keep in mind that for the Agronn's X-Top flight simulator panel you will need to implement the solution to tilt the throttle quadrants in order to be able to use the full extent of the lever's movement. With the default setup the reverse thrust lever of the throttle may not allow the throttle to be fully advanced. I am working on the proper solution for this problem.
The main body and the cover must be printed with their inner areas facing upwards. The handles must be printed vertically, starting from the flat side. The reverse thrust levers must be printed with their outer sides facing upwards for the better finishing. The reverse thrust blocker must be printed as shown on the model's picture. Both engine numbers must be printed with a brim.
All buttons must be printed separately and then installed into the main handles and into the assembled body of the throttle. The ATDIS button can be pushed into the handle with force and it will stay there. The TOGA button may need to be glued to the main body before the cover is closed. No need to glue it to the cover, otherwise opening the throttle may be problematic.
The main and reverse thrust handles must be printed in white color, other parts can be printed with silver or black color. The TOGA and ATDIS buttons may be printed in silver color.
The throttle needs to be properly assembled after printing. The thrust reverse lever, 3 gears and the reverse thrust blocker must be installed into the body so that the reverse blocker is in its lowest position while the reverse thrust handle is fully lowered. When the reverse thrust lever is lifted, the reverse blocker must be also lifted all the way up and touch the limiting cylinder with its top.
If you have a tight fit (gear+axis, lever+axis, blocker+body), please apply a bit of grease or trim the part accordingly with a filer or sandpaper.
The cover is fixed to the main body with 5 identical screws (black-painted 3.0 x 20mm). The reverse thrust handle is fixed to the lever with a 3.0 x 10mm black-painted screw). The main handle is fixed to the body with a 3.0 x 20mm black-painted screw. Do not tighten the screws too much or you will break the holes and you won't be able to keep the parts connected to each other.