边边角角、缝缝隙隙的空间都要利用好。支撑杆的一端由橡皮筋固定，防丢并自动收起，很方便。东西虽小也有科技含量哈。这个杆子是玻璃纤维材质，来自$30Canadiantire的screenhouse。 这个screenhouse让我给大缷八块， 对，橡皮筋都是从它来的，后面还有更多材料来自于它。

总的来说，北美的营地是最好的，大多三面有树，距离也大，私密很好，大多不用窗帘，但两个人出去，有些场合还要用一下，还是为所有的窗户都做了窗帘，材质选自一次性桌布，体小价廉，依然用磁铁做为锚点，不同于外部，内侧有的地方没有金属需要用双面胶固定磁铁。

the platform is supported by 3 wood bars and 1 round metal rod(curtain rod left over from Ikea). The two middle wood bars will be permanently joint by middle board. Take close look the picture, the first wood is anchored by two twisted brackets, the two threaded holes are existing for the seats. Since the seat holes are with angle, you have to use pliers to bend the bracket in order to join to the 2x4. The second wood 2x4 attached two short legs which are sitting on sheet metal, for proventing from "jumping up", using tiewrap and metal wire hooked at existing square hole. The third wood bar is tied to two D rings by Velcro.

Digged two nortches are for the trunk board toungues which plays like hing

The most challeng part of building the platform is how to deal with the removable section. This section has to be securely supported when in bedding, also need to be easy setup; secondly this section including supports must be not interference with the slide back seats, and also no interference when seat back tilt down when in driving mode.

I over throw a couple of different solutions, this one I believe is the best to me.

This removable section(2 small piece, one of is table) one side is supported by first 2x4, the other side is supported by metal rod ( not shown in this picture , see previous post). The metal rod two ends hanged to existing metal knob ( for hang up folded back seats). I'm afraid the rod and two knobs not strong enough to take the whole weight, my option is adding middle support. See the pic, that why first 2x4 attached a T. On the T, there is arch shape cutoff it is for he rod swing when seat tilt or move back. (rod will swing around the hanging point)
Generally speaking, as long as throw the two boards away, the seats are freely move back forth, tilt up down, the rod will follow the seat moving. 
When setup for bedding, simply move seats forward, put two small boards in position, that's it! Ready to go.

前面贴过这张图，可不要被这张图所误导。这图是我做完了，闲着无聊照着事物画的。看看这个轮廓，不是能设计出来的，我是用硬纸板trace出来的。具体做的时候有很多技巧，打字太累了，不能一一列举，欢迎随时提问。再这儿也回答一下有些同学的疑问。整个床板长两米，从图上可以看出，人的肩部需要的空间最大，正好落到了最宽的车门处，两个人住起来相当宽敞。CRV是比较小的crossover,从外表看很多人都不相信这里面能睡下两个人。这个改造不是刚设计出来的beta版，是经过多次实战演练的，非常实用，是个好东西。

BOM
Ply wood 4x8' Homedepot
Scree house  for material of mesh, rod etc.
2x4 2
Fleece 2
Megnets  ~100. Buy from Aliexpress
Curtain rod  from Ikea
Duct tape
TOOLS
cutoff saw, circular saw, jig saw, drill, ...
Skill: medium+ 
Length:200cm
Head room (highest):100cm
Weight Chang: Reduced >50lb (Yes I'm not wrong, it's Reduced)
Because it is lighter, better fuel economy, I keep it on all the time if possible.

就在这个营地(大烟山)，起的比较早正准备早饭，大多数人还在睡梦中，有一大汉说话声音特别大，毫无顾忌，直到这人走到我附近，我才弄明白怎么回事，他手里拿着一个有18寸长的长把大饭勺，嘴里不断重复：I think it's five, I think it's five......在他从我面前经过的时候，看在那个勺子的面上，我都没敢正看他一眼，我心里暗自嘀咕：If you think it's five, it is five, it is five...

好书归正传，仔细看图，看到车门上的纱窗了吗？收装非常方便快捷，很喜欢磁铁snap on的手感。