I had to do 3 across in my sienna last weekend so we could fit 4 adults and 3 kiddos. I wasn't happy to discover that my 5yos turbo wouldn't fit in the middle (the part between where the seatbelt connects down from the ceiling and where you have to buckle the seatbelt in the female end was too narrow for the turbo to fit in between). Anyone used a booster in this position? We just ordered a RSTV, so in the future it won't be an issue, but I'm just curious.