OK, so you're in luck, I just fitted some Froli springs and road-tested it last night.
I have a Reimo Easyfit roof, and installed the Berger Sentina system on it, which I bought from the store in Germany when on holiday last week.
They are made by Froli but are branded Berger (by Froli). They're cheaper than the Froli branded system, seem more substantial also then some of the other Froli systems, and I bought them because they didn't have enough Froli-branded stock in the shop for my roof size.
I bought one base pack (€98) and two supplementary packs (€40 each), which I installed with minimum spacing between the springs - so the most firm setting. This fits the Reimo space in the roof exactly when the springs are placed at their closest positions together. The springs are 44mm in height, and can be placed directly on the roof base without the need for the additional mesh layer. I'd also recommend velcroing down the 4 corners and centre of the sides otherwise they move slightly when the roof is raised.
On top of that I have the Reimo basic foam mattress (I think it's Reimo, came with the van). It's about 4.5-5cm thick, although the foam inside it is only 2.5cm, and is about 108 x 200cm in width/length.
So, first night sleep on this setup - it was comfortable but firm. I suffer from a bad back but woke up without any pain, so the Froli springs did their job. But the bed experience was firm overall.
I'm now going to experiment with moving the springs apart from each other by 1 notch (there are 3 settings in total) to see how much that softens the mattress base. In which case, I didn't need the second additional pack of Froli springs. The base pack has 44 springs, each additional pack another 11. I'll also try the same setup as I slept on last night, but with a 25mm additional foam base, to compare.
Some things you need to know:
- with these springs (42-44mm height) and the 4.5-5cm mattress base, the roof doesn't close. I reckon it's about 2-3 cm too high and prevents closing at the back. So the maximum gap/space you have to play with is 6-7cm to ensure roof closes correctly
- some of the other Froli springs are lower in height. The range, in addition to the Berger I used, are as below:
Star - standard for motor homes, looks identical to the Berger system but in a different colour
Travel - lower height
Scor - Optimal ventilation and adjustment of the firmness level
Mobil - Ideal for heavy sleepers
and in retrospect I think I should have gone for one with lower springs height to be able to keep my mattress in the poptop, although I reckon smaller height springs will be even more firm. I did measure at the time of buying, but wasn't aware until I finished fitting that the back of the poptop has a lower height threshold for closing then the front.
- they are all a doddle to install. Takes about an hour just to clip them all together. If you have kids, get them to do it, it's like an easy jigsaw puzzle!
Verdict - worth doing, I think, but need to play around with it to get the right firmness (softness) setting. I'm used to firm mattresses but I think a medium settng on this particular system would suit better, in which case I could have saved myself €40 on buying an extra extension pack. Don't believe the size guides either, a grid of 5 x 11 (Berger) springs will fit a Reimo roof on a medium firmness setting and 6x11 for a firm setting.
hope this helps, link below to what I bought. They do ship to the UK as well but unsure if you will end up paying customs duty.
Berger Sentina Mobil by Froli Bed System Basic Package in Sleeping Comfort
www.berger-camping.co.uk
. Don’t want to remove mattresses so scratching my head at the moment to see if I can knock up a frame and drop bed by an inch or two. If it fits in Reimo highly recommend Froli system, good luck
