In regards to being the same suspension, everything is relative in trailer parts. If your Reflection has 7000 lb axles, does it have 8 lug wheels? The reason I ask this question is that 5200, 6000 and 7000 lb axles all have the same spindle dimensions with exception of the seal area and possibly where the spindle welds into the axle tube. 5200 and 6000 lb axles have 3/16 wall thickness on the axle tube typically or .180+-, 7000 lb axle tubes typically have 1/4 inch wall thickness or .250. It is possible to get special made axles with heavier walls. Leaf springs are a little tricky. My best advice is to replace all 4 when replacing springs, or take a spring off and measure the eye to eye, center to center distance. My factory 3500 lb springs on my 310GK were 25 1/4 center to center and that is what I replaced them with the first time around. This time I had to settle for springs that are 24 7/8 center to center unloaded and they look to be ok, the spring shackles are at a little steeper angle, but they should be fine. Granted the trailer hasn't been on the road yet to see if the springs settle a little or not. Are your ubolts the same? Check the nut size, if a 3/4 inch socket fits your nuts, your ubolts are 1/2 inch diameter. If they need a 7/8 socket, your ubolts will be 9/16. I mistakenly thought my trailer would be the same as one of the posters on this thread who stated the ubolts were 1/2 inch and so I ordered 8 -1/2 inch ubolts that were long enough for the new leaf springs and a 1 inch lift block. Wrong, my ubolts were 9/16. So now I have 8-1/2 ubolts that need a home. Back to parts interchangablity, I recently converted my 16 foot flatbed trailer from 6 lug wheels to 8 lug wheels. The trailer has two 5200 lb axles and I installed my like new 8 lug hubs and bearings that were left over from when I upgraded my Solitude to disc brakes. The 8 lug hubs and bearings were a direct fit, but I did have to use the same seal diameter as the 5200 lb axle and the grease caps are different because the 7000 lb hub has a larger outer bearing, but still fits the same spindle. 5200, 6000 and 7000 lb axles all use 12x2 electric brakes and I had a brand new set on the shelf from when I discovered grease on my brakes that were sent to me by grand design. If your springs are pretty flat, they might need an upgrade. Count the leafs on the springs. 5 leaf typically are around 3000 lb ea, 6 leaf are typically 3500 and 7 leaf are typically 4000. Does your reflection have a tube steel piece above your spring hangers? Inspect your hangers and look for cracks and also the frame web above the spring hangers. Clean the area on the frame well with a wire brush or a rag with soap and water. Stiffening the springs could possibly result in more stress on the frame when turning because the thicker leaf pack won't flex as easily. I would recommend adding frame stiffeners to prevent failures down the road.