There is 2-5/8" between the screw holes on the Optronics Trailer License Plate Light item # LP71CB.
I have linked a diagram below with additional measurements. view full answer...
I checked out the included screws with the Valterra Heating and A/C Vent Register # A10-3350VP and found them to have a diameter of 1/8" and they were 3/4" long. The mounting holes are separated on center by 3-1/8". You can use all of this info to determine if it will fit your application or not.
A review video of this vent is linked for you to reference as well. view full answer...
Since you said you can use a Solera awning tube and yours is 19 foot 6 inches long the correct replacement roller would be the part # LC33FR. view full answer...
The Thomas Payne Swivel Glider RV Recliner with Heated Seat part # 195-000029 measures 29-1/2" wide x 35" deep x 41" tall so if you have this much space it will fit. view full answer...
We have a great option.
It's the Hollywood Rack Sprot Rider SE2 with Cargo Carrier, part # HR1450Z-85. This will allow you to carry 2 bikes at 50 lbs per bike and 100 lbs of cargo. It fits 2" receivers and has an anti-rattle knob to reduce sway.
I've linked to a video review of this combo for you to look at. view full answer...