My wife and I just had twins about 10 days ago. In the lead up to the birth, we tried to cover every base we could as time was going to be in short supply. The car seats we purchased were Peg Perego, and we purchased a "universal" stroller to attach the car seats to.
The Baby Trend Universal Double Snap-N-Go is billed as universal. It is far from it. We found on leaving the hospital that all that secured the car seats to the stroller was a strap allowing them to rock about 3" front to back. That didn't instill confidence, and the car seat specific stroller runs another $700, so I started searching for a solution.
The solution takes about 30 minutes and cost about $20. I can't understand why there are not specific aftermarket kits for each brand sold by Baby Trend, but for whatever reason there aren't.
I am short on sleep and time, so I will try to describe what I did and what you will need.
Step 1: Gather Materials
For this Instructable, you will need:
1. Baby Trend Universal Double Snap-N-Go stroller
2. At least one of the car seats you will be using
3. (2) 3/8" solid aluminum rods 48" in length (Available at Home Depot $7.71 ea)
4. Pop Rivets
5. (2) 10-32 x 2" machine screws, washers, and stop nuts
1. Hacksaw or Metal cutting Saw
2. Vice (for bending aluminum)
3. Drill with 1/4" bit and 1/8" (or same diameter as the rivets you are using)
4. Pop Rivet gun
5. Grinding wheel or bench sander or file