One of my most favorite projects has been to upgrade the Walthers 3-2-Lounge-Sleeper Observation Car into a Heavyweight Business Car.

One of the ways I do this is to remove all the detail off the leftside of the roof, (Looking from the observation deck, forward).

Then either use the " New England Railcar Service ", I think that is the name of the manufacturer, They have a kit for the Roof air ducts, or I scavange the same roof detail from one of my other walthers heavyweight passenger cars and sand it down to fit, Then I use the roof detail from some of the Rivarossi 1930s Style Dining cars or Under Detail from one of Walthers " Pullman Standard 48Seat Dining Car, and replace the obsolete equipment with the more modern underbody equipment, Such as the Propane Gas Bottle Boxes, The Waukeshau AC with SubCooler and Modern Battery Boxes.

I'll also blank out several of the windows, (Since to rebuild the interior would take too long and create a terrible mess).

Also you can either keep the same trucks or use the trucks from the Budd Fulldome Lounge car, Which I do.

Then add a rear, roof warning light, markers, And interior lighting, I use a Rapidotrains, N Scale Lighting stripe, and the red warning beacon or red light, I use  LED Lights from the eBay Seller named ScaleLike to finish off the cars.

Then paint them into my favorite paint scheme, or if they are already painted, Just paint what is necessary to paint.

My question to the community, especially those who have used Silicone Rubber mold making kits,

I have two mold boxes with underbody detail that I want to make copies of using the RTV silicone rubber.

The silicone rubber is in two parts, one is the silicone rubber base, and the other is the curing liquid, (Yellow), I have no gram scale but I have two 2 Cup measuring cups, One shot glass and two small cups formally used to take medicine.

What I need to know is how much of both silicone rubber mold making parts do I need to fill the mold boxes, which are 4 1/2 " in Length, 2" in Width, and 1" Deep, how much of the white silicone rubber base to the yellow catalyst do I need to use?

EspeeRte51