Glad to hear you are planning on staying
RF as long as possible. (I won't tell your teachers about your run-on's if you don't tell mine. I tend to type like I speak.)
The
radian is the narrowest
convertible seat out there, but a seat that sits up on a base may get a better fit. I haven't had personal experience with such a bucketed back seat---so again I reccomend going someplace where you can try before you buy. I've taken seats out to my car at both BRU and TRU. When you try a seat out, try both ways. It's reccomended that children remain harnessed to 5-6 yrs. And well those reccomendations may change by the time your little one gets to that point. Car safety for children is something we learning more and more about---improvements are being made very frequently. I would also check the Cosco Scenera. It's about $43 at Wal-Mart--and returns there are easy. If you can't find a
Radian locally to try, you can buy on target.com and return to the store.
You can't put anything under a seat when it's
forward facing because it wasn't tested that way is the simple answer. I don't have my training manual in the house(and it's cold out), but if I remember correctly it has to do with how far forward their head moves. There is an allowable amount--and any more is deemed too dangerous. Also when you use the seat in a way that is not reccomended by the car maker or the seat maker you void the warnenty AND any liability should something happen to your child in a crash...in essense you've made your precious child into a crash test dummy.
For the board...even attached to the car... In a crash the G-Forces will cause the board to break, then make the carseat loose, and run the risk of injuring your child. Again...child becomes real life crash test dummy. The one that is under your seat is attached per manufacturer specs...and I'm not going to pretend that I begin to understand the engineering that goes into those designs. I do know that there federal regulations(FMVSS) that tell what gets used and how it gets used, ect. And they are tested extensively.
LATCH stands for Lower Anchors and Tethers for CHildren. All cars made in Sept 02(I'm real close on that date) and after have this system. You canNOT have the lower anchors retrofitted in most cars. I think the only brand that does this is Audi. No reputable shop would take this on...as it's a HUGE liability for them when it fails in a crash.
You're welcome. I can tell your a dad who cares about their child and wants to do what's best, otherwise you wouldn't be here trying to find answers to your questions. I understand not wanting to purchase a new car--one of ours is paid for as well. We live in the sticks and there is little to no public transportation.
I do think that with where your seatbelt buckles are---it may play a role in whether or not you can safely secure a child seat there or not. Unfortunately some cars are just not compatible with carseats.
I hope I'm doing a decent job of answering your questions.
Susan